Release note at http://www.sublimetext.com/2:

Build 2027 Release Date: 19 February 2011

Added command show_at_center, which scrolls the view to center on the selection. This is bound to Ctrl+K, Ctrl+C on Windows and Linux, or Ctrl+L on OSX.

I'm using a 2.0.2 build 2221 on Mac and Ctrl+L works well for me.