I'm going to try out Crunch3r's beta ATI/CAL Boinc 6.6.20. Brief details and download links for 32 and 64-bit versions are at http://calbe.dw70.de/mb/viewtopic.php?f=3&t=113
Just a heads up for those running MilkyWay ATI (and/or Collatz Conjecture on ATI).