If you are a fan of google docs , then I suggest you try Buzzword.. Buzzword is one of those services that allow you to create documents & share them.
Another service is Create PDF that allows you to convert many files formats to PDFs & much of more converting PDFs to flash to be embedded in web pages (It's really good, I once tried it here)
But what I really liked most is Adobe Connect now, it is indeed one of the very nice services that allows you to make an online meetings that involves desktop sharing, video & audio conference calls & chatting... when I tried it, it was kind of slow but I think the reason was my internet connection..
Anyway, I truly like their services.. give them a try..