Microsoft Clustering on VMware vSphere: Guidelines for Supported Configurations

http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1037959

MSCS RDMs causing long boot of ESX

That's because RDM LUN attached to MSCS cluster has permanent SCSI reservation initiated by active node of cluster.

In ESX 5 you have to mark all such LUNs as perennially reserved and your ESX boot can be fast as usual.

Here is CLI command to mark LUN
esxcli storage core device setconfig -d naa.id --perennially-reserved=true

This has to be changed on all ESX hosts with visibility to the LUN.

More info at http://kb.vmware.com/kb/1016106

VMware: Timekeeping best practices for Windows

http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1318

Microsoft NLB Cluster on VMware

Microsoft Resources:
http://support.microsoft.com/kb/323437
http://support.microsoft.com/kb/323431
VMware Resources
http://www.vmware.com/files/pdf/implmenting_ms_network_load_balancing.pdf
http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1006580
http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1556