I recommend this approach to sync config files over Dropbox to get exactly the same editing environment from Win, Mac, and Linux:

1) move the /User folder under "Sublime Text 2/Packages" over to Dropbox/ST2/User

2) in Win goto CMD and from the %APPDATA%\Sublime Text 2\Packages folder enter: mklink /D "User" "path to\My Dropbox\ST2\User"

3) in Mac OSX/Linux goto the Packages folder (you can find the location under >Preferences>Browse Preferences) and enter: ln -s pathto/Dropbox/Sublime\ Text\ 2/User ./User

The fantastic thing with this setup is that in any new machines, Package Control will automatically take care of installing any missing plugins.