Some new ESX 3.0.1 patches are available. Update ESX-3199476 adds support for using Microsoft Clustering Server (MSCS) with Windows 2003 Service Pack 1 (SP 1) and R2 Guest Operating Systems.
There are now a total of 20 patches available for download. BTW: High on my ESX agenda is: creating some general (Perl) script and a (virtual) update server for easier maintenance. Why? Because installing 20 updates for every existing/new server introduced in the environment is a pain in the ***. Download them here