"We’re really excited to bring you forms! Create a form in a Google Docs spreadsheet and send it out to anyone with an email address. They won’t need to sign in, and they can respond directly from the email message or from an automatically generated web page. Creating the form is easy: start with a spreadsheet to get the form, or start by creating the form and you’ll get the spreadsheet automatically."

Offhand I can think of, oh, a zillion ways to use this.

boo - 5,000 row limit?

Good list of online tools the Litmus team uses.

Wiki, files and tasks for teams - open-source, with a paid hosted option. Has client software that allows offline access and syncback for files and tasks, but not for wiki content. C'mon people, this is a solvable problem.