In case you missed it over on the MDOP blog, they just announced that Microsoft Desktop Optimization Pack (MDOP) 2009 R2 will be released in late October 2009 and will add Windows 7 support for all components except for MED-V:
Interesting news, I sort of thought that current 4.5 (CU1) already supported Win 7 officially..
So the "Integrate with third-party LDAP directories" -part actually does not mean direct integration but rather something you have had in the product already (based on list of fixes of some hotfix over CU1) but not officially supported scenario?