Hotfix Blog had a lot of goodies from the last 2 months...
* Update for XP & 2003 networking on a 2008R2 VM host
* Update for accessing shared files & printers on Vista & 2008
* Rollup of Hyper-V hotfixes for 2008 R2
* Fix for 32-bit applications on x64 7 & 2008R2
* Fix for Windows 7 / 2008 install on a UEFI hard drive
* Enable Dynamic Memory support (2008 R2 feature) on 2008 VMs
* Fix for system hangs on Vista, 2008, 7, and R2