This is all I could find (for 4.01)
http://www.vmware.com/support/converter/doc/releasenotes_conv401.html#guestos
Converter Standalone 4.0.1 supports the following guest operating systems:
Windows NT SP6 and later
Windows 2000 SP4
Windows XP Professional (32 bit and 64 bit)
Windows Server 2003 (32 bit and 64 bit)
Windows Vista (32 bit and 64 bit)
Windows Server 2008 (32 bit and 64 bit)*
Red Hat Enterprise Linux 2.1 (32 bit)
Red Hat Enterprise Linux 3.0 (32 bit and 64 bit)
Red Hat Enterprise Linux 4.0 (32 bit and 64 bit)
Red Hat Enterprise Linux 5.0 (32 bit and 64 bit)
Red Hat Linux Advanced Server 2.1 (32 bit)
SUSE Linux Enterprise Server 8.0
SUSE Linux Enterprise Server 9.0 (32 bit and 64 bit)
SUSE Linux Enterprise Server 10.0 (32 bit and 64 bit)
Ubuntu 5.x
Ubuntu 6.x
Ubuntu 7.x (32 bit and 64 bit)
Ubuntu 8.x (32 bit and 64 bit)
CAUTION: During cloning of powered-on Linux machines, Converter Standalone 4.0.1 preserves the following source file systems on the target: ext2, ext3, reiserfs, and vfat. All other source file systems are converted into ext3 file systems on the target virtual machine.