Charging multiple devices

Pierce, Using a Power Bar is one solution you could consider. Both the three-outlet model suggested by Elle and the six-outlet model suggested by James should work just fine, as they're both designed for operation on 220 VAC electrical systems. A Power Bar is probably the best solution under the circumstances, as all of the devices you're charging likely have proprietary Chargers. All of the devices you'll be taking probably have Chargers designed for operation from 100-240 VAC, but it would still be a good idea to check that. Your comments about bringing a Phone raised some red flags. I'm assuming you've verified that your phone will actually work in Europe? Which network are you with and which model phone are you using? If you're using a Smartphone such as an iPhone or Android, you'll need to be EXTREMELY careful to avoid data roaming charges, which can be HUGE (ie: five figures). "Those 'slots in the wall' that require you to put your key card into in order to turn on the juice will work with any card that size." That's true in some cases, but will depend on the technology used to activate the electrics. In many hotels that I've encountered, the card only activates a micro-switch in the Reader, so anything that trips the switch will accomplish the same function. However, if it reads data from the card, that method won't work. I'm not comfortable with leaving anything charging when I'm not in the room, so that's a method I only use on very rare occasions. I usually charge gadgets when I'm back in the room for the night. Happy travels!

To everyone, thanks for all the great help, suggestions, and tips. Y'all really solved my question above and beyond my expectations so it's very much appreciated! If anyone wants to continue to share ideas, tips, or miscellaneous information please feel free too, everyone gains from the info. Again, thanks!

Use a plug adapter. Stick a two-buck outlet multiplier on the end. Piggyback a couple if you need to because of what your cord end look like.

Don't use any sort of US (or Texan) power strip which has any sort of electronics like surge protector or lights or anything which will, unless rated dual voltage, likely fail spectacularly with a suitably impressive show of smoke and sparks and bangs, maybe flame if you are particularly lucky, as soon as you plug it into the 240 volts this side of the water. If that happens your landlord or hotel manager will likely take a dim view. Do as Ed says and use dumb cubes.

A few years back I bought this at Magellans and have found it very handy.
Dual-Voltage Power Strip with three outlets and a USB port

Go to Amazon and search "VCT - 220V/240V AC 13A Universal Surge Protector / Power Strip with 6 Universal Outlets" and that is probably what you are looking for. Me, I would go to the grocery store and buy a cheap rubber three way splitter like we all have behind our television sets so we can plug way too many things into one outlet and then I would go to Amazon and search "Heavy Duty Grounded USA American To European German Schuko Outlet Plug Adapter" and you will hit on what I think is the best plug adapter on the market. This is a fraction of the weight of what you are looking for. For me when I travel, weight is everything.

Those "slots in the wall" that require you to put your key card into in order to turn on the juice will work with any card that size. I've used a retiree's i.d., concealed weapons permit, and have even cut our a piece of cardboard to use.

There are several kinds of devices that will charge multiple electronics at one time- and only the one item is plugged into the wall. Here is one example http://callpod.com/products/chargepod
You'd want to use a plug adapter and check the voltage to determine if you need a voltage adapter.

@Toni, I was going to suggest using a ChargePod, however in these specific circumstances that probably won't work as each device mentioned above will likely use a proprietary Charger, rather than a standard USB-level Charger. That will certainly be the case for the MacBook and probably the DSLR. I routinely use a ChargePod on travels, and it works great for things like my iPod, iPhone and Garmin GPS which use standard USB-level voltages for charging, but it won't work for either of my Canon DSLR or P&S Cameras or my Netbook, as they use proprietary Chargers. The large transformer-based power cube for the ChargePod IS designed for operation from 100-240 VAC, so it works just fine in Europe with only a Plug Adaptor. Cheers!

"a suitably impressive show of smoke and sparks and bangs, maybe flame if you are particularly lucky" Woo-hoo - a fireworks spectacle LOL! After which, you quickly pack your bags and leave the premises... "Those "slots in the wall" that require you to put your key card into in order to turn on the juice will work with any card that size. I've used a retiree's i.d., concealed weapons permit, and have even cut our a piece of cardboard to use." Good to know, Monte! I just use something like this (<$3 at Home Depot); you could splurge and get this one for the hard-to-leave-behind color. Note this one is 3-prong - be sure your European adapter will fit! You may want to just get a 2-prong 3-way adapter. Also, bring several European outlet adapters - they get lost, fall behind dressers, and at times you may need to use 2 of them piggybacked to access a deeply-recessed outlet. ALL of this assumes that your electronics are all dual voltage...!

hard-to-leave-behind color. You're right its hard to forget. Looks proper industrial. Should give the maid/housekeeper the proper impression...

Unfortunately, Nigel, all of that extraneous stuff - charging paraphernalia, clothes washing/drying stuff - goes away while we're out of the room ;-)