Question: What is a Wiki ?.. Answer: Well a wiki is a private website designed for collaboration. Unlike a traditional website where pages can only be read, in a wiki everyone can edit, update and append pages with new information, all without knowing HTML.
One more Question: Why did Google acquire JotSpot?
Answer: JotSpot's vision is helping people collaborate, share and work together online and Google shares the same idelogy. JotSpot's team and technology would be a strong fit with existing Google products like Google Docs & Spreadsheets. So whats Microsoft,Yahoo doing ?
Microsoft and IBM have recently announced upcoming wiki offerings, and Yahoo has a partnership with PBwiki to host wikis for Yahoo Groups.
Want to know more about JotSpot?
JotSpot Introduction - http://www.jot.com/video/JotSpotIntro/
Application Gallery - http://www.jot.com/gallery/?from=landing
Complete Tour - http://www.jot.com/video/tour/