Need a place on the web to share trip planning

try one of the services like dropbox.com It creates what is essentially a folder on the web. You can have various sub-folders that are private to you, shared with just who you invite, and open to the world. You get 2GB of free storage. You can access it from your computers (I use it to share files between work and home), from smart phones, and from any web browser.

If you have Gmail you could try the document sharing feature. My husband and I use that when we're collaborating on trip plans.

I would couple any of these file-sharing sites with either a simple blogger blog (kept private and limited to the five of you) or a private email list (such as a yahoo group).

Either will let each of you post and respond to ideas and questions from each other as you pull the trip together. Both are free.

We use Goggle doc. The author has to have an account with Goggle but the others do not. Also use that doc to advice others of what our travel plans are.

Second (or third) Google Docs.

Google Wave. I think it's still in Beta Testing and you'll have to get someone to sen you an invitation, similar to Gmail.

I think they've opened Google Wave up, since at http://wave.google.com/about.html it says "no invitation needed"

Thanks everyone, for the wide range of suggestions. We have decided to use a Google email account set up for the group + Google docs tied to that group. Eventually, I may try the blog idea, too. Thanks for the help!