Also, it would be nice if the project switcher worked for projects that are currently open.
C:\Users\[Username]\AppData\Roaming\Sublime Text 2\Settings\Session.sublime_session
On a mac it is:
~/Library/Application Support/Sublime Text 2/Settings/Session.sublime_session
On Mac OS X .. open
~/Library/Application Support/Sublime Text 2/Settings/Session.sublime_session"
Then find the section
"recent_workspaces"