With Zeitgeist now tracking everything I really think we need a privacy mode like the one Firefox offers. There is a ridiculous amount of history and caches being stored in Ubuntu from thumbnails to file history.
And god forbid you install a KDE application in gnome, then you get even more file indexers and recently used tracking! Is there a way to clear everything? Even better would be a way to run the OS in a privacy mode that never even wrote to the disk. How can I disable all caching and thumbnailing and history in the OS? Firefox provides private browsing. IE only allows you to delete the cache when you close IE. Firefox wins! Can I get a private session in Ubuntu?
Also, my company would like to run Ubuntu off an SD card. Limiting the number of writes to update a cache, history or log would be a really good idea. Switching back and forth would be perfect. Right now Zeitgeist is working on a way to clear history, but come on, can we have an option to not write a history at all? Am I missing something here?