three years ago i was running vmware workstation 3 or 4 (i don't rememeber)
the physical machine was a dual pentium @90 MHz with 56 Mb RAM and NT4 Workstation
in the vm i had slackware 10 (or 9, i don't remember). the vm was allocated something like 8 or 16 Mb

note: the installation of the vm os guest took about two hours