These are the changes or updates made to VMware Compatibility Guide since it was last published:
- Added support for FreeBSD 8.0 on ESX 4.1
- Added support for Debian 4 r9 on ESX 4.1
- Added support for Debian 5.0.5 on ESX 4.1
Check the VMware Compatibility Guide here: http://www.vmware.com/resources/compatibility/search.php?deviceCategory=software&testConfig=16