Alpha: 
REV.B Recovery
September 2000 Recovery
October 2000 SDK
October 2000 Recovery
December 2000 XDK
December 2000 Recovery (With very basic laucher, but with plane reflection demo)
Feb 2001 XDK
Feb 2001 Recovery (with newer type launcher, but still basic)
March 2001 XDK
March 2001 Recovery (with BETA MS Dashboard!)
April 2001 XDK
April 2001 Recovery

Beta (DVT3)
June 2001 XDK (BETA 1)
June 2001 Recovery (BETA 1)
July 2001 XDK
July 2001 Recovery