It seems Google just acquired jotspot. I had never heard of jotspot before. After a little searching it seems to be a pretty powerful wiki, much more than pbwiki. Of course they closed the registration, but you can put in your email address to be notified when it opens back up. I also found a link to a video tour of the site from google's cache, look at the bottom of the page. I must say I am impressed.Some of the features are sharing documents, group calendars, and spreadsheets. If you have gmail, you already have 2+ GB of storage space. Could this shape up to be the interface or front end of Google's office suite or Gdrive.