A few further thoughts on using an IPod Touch vs. a Netbook.
The IPod Touch is fine for "light duty" uses but you'll probably find that it's a bit awkward for "normal" use, due to the small screen and the "hunt & peck" keyboard. It is a well designed product but has some inherent drawbacks due to the small size and small screen.
I have to agree with the previous post that indicated that ironically many of the high end Hotels seem to charge for Wi-Fi, while many "budget" places often provide this at no cost. Some Hotels also provide one or more computers (often Laptops) for use by guests, in addition to the Wi-Fi.
I'll most likely be buying a Netbook before my next trip, as I've found that the somewhat limited computer facilities in a Hotel are often extensively used, so it's difficult at times to get access to them. The other issue I've found (especially in France) is that the keyboard layout is VERY irritating for those used to North American keyboards (these vary by country).
I'm in France at the moment and will be heading to Italy in a few days, so my comments are based on my experiences so far on this trip (and previous trips). I do have an IPod Touch, but have used this mostly just for "emergency use" or quick checks of internet sites.