I don't like their new formatting of late, but found some good hotfixes on Hotfix Blog...
* File-sharing bug on Vista/2008
* Memory leak by networking service
* Hopefully these stop BSOD from happening with iSCSI in Vista/2008: Fix 1 & Fix 2
* More-reliable TCP/IP stack for Vista/2008
* Slow file-sharing on Vista/2008
* Slow networking on multi-processor systems: Windows 7 / 2008 R2