This had been driving me nuts for a little while. Maybe I can save someone else the hassle too.

To set a shortcut key for Subclipse commit:

• Go to Windows → Preferences
• Go to General → Keys
• Check the box "Include unbound Commands"
• Then in the "type filter text" box, type commit
• Then assign it to whatever key combination you want

If you go through this, and commit and other SVN methods don't show up.

• Go to Help → Software updates → Find and Install
• Choose "Search for updates of currently installed features."
• Go through the choices and update Subclipse.