I absolutely love Google documents and wouldn't be without it. Although I've never used it for work, in my personal life, I use documents, forms and spreadsheets to do just about everything. My writing is all in the cloud, which means I'm less likely to lose drafts and random snippets that I might want some day, and Google forms are just brilliant. I'm running something right now that has over 60 partipants, and the forms make life so very, very much easier. I think the best thing about Forms is the way the results are kicked out - easy to interpret and manipulate however you need. Although I've never used Google Presentations - and doubt that I'd want to move away from Powerpoint for creating them - being able to upload them to the cloud means I don't have to worry about file corruption or my terrible memory. If I forget anything, it'll be there for me to edit, and I can always download it as a .ppt file again.
Rather than email my form, I thought I'd try to embed it. Click the jump link to see if it worked!