Randy Rogers has an interesting post about Google's survey tool, which is part of Google Docs. I haven't really used Google Docs much, but this looks like it could really be useful. He also has a link to a great video to explain how to use the tool. It can be found here.
I tried this out for myself and was really amazed by how easy it was. The data automatically goes into a spreadsheet in Google Docs. I was afraid that you might need a GMail account to access it, but you can send the form in an email to anyone, and they can complete it in the email itself. At least I was able to do that with my Yahoo accounts, and the results showed up in my Google Docs spreadsheet.
Right now I am not sure why I would need a survey tool but this is definitely where I would go to first if I needed to survey people. It was super easy!