BioWare has re-invited some of the folks that were invited into last weekend’s beta test.. If you were re-invited, you should have received an email by now.  The swtor.com/tester page will not update to reflect this weekend’s test.. and your characters from last weekend should still be there..
The best news is… the version of the game being tested is now the launch version! If you played in last week’s beta.. you don’t need to re-install, just fire up the launcher and take the updates!