Here are some profiles that I am using, and perhaps others will find them useful.
8021xDisable.mobileconfig - Unchecks the "Enable automatic connection" checkbox for 802.1X in Network Preferences. This was built by grabbing the plist and using Tim Sutton's mcxToProfile tool
DisableScreenSaverPassword.mobileconfig - Disables the "require password" on resume from screensaver.
Office2011Prefs.mobileconfig - Disables first run splash screens for Offce 2011 apps. Based on plists from William Smith and converted with Tim Sutton's mcxToProfile tool. You will probably want to change the User and Company information on lines 198 and 200.
MouseRightClick.mobileconfig - sets the mouse right click to "Secondary Button" for a mighty mouse. Thanks to Patrick Fergus for this one.
VLCSettings.mobileconfig - gets right of first run prompt and disables updates for VLC