It is very interesting to watch the web 2.0 services and websites
being acquired by larger corporate players. Google has acquired both
Writely (now Google documents and spreadsheets, integrating both Google Spreadsheets and Writely functionality) and YouTube in the past year– and now Google is into the Wiki world with its acquisition of JotSpot.
Jot.com was one of the first wikis I ever used, back in the Spring
of 2005 when our educational law class research group used it to create
a “Student Cell Phone Use and Other Technology Concerns for Schools” wiki. My favorite free wiki sites are now PBwiki (great because its tagging markup is so simple, and you can have a private wiki for free) and WikiSpaces (nice because of its better WYSIWYG formatting options.) It will be interesting to see how the feature set of Jot.com changes (and hopefully improves even more) now that Google has acquired them.