I guess I should keep my exposing to myself ...

Notable changes:
Exchange support in Mail app
Expose = too cool
Finder = /much/ better
Fast user switching = very cool (i don't have to logoff if my wife wants to check her email)
Bunch of UI refinements

those are the big ones ...

My main development and gaming box is currently WinXP. I am seriously considering a 17" powerbook as my replacement development computer though. As far as Linux goes, my two servers run Linux mainly because it's just plain cheap ... Other than that it doesn't really offer that much that is compelling over OS X (and OS X offers a /lot/ compelling over Linux). IMHO of course ...

ms