I tried vmware and I sorta liked it, but then I tried virtualbox and I liked that a whole lot better. VB seems to work fine for linuxy development servers (lamp, rails), can't say whether vmware might be better for production, or for windoze server. (I do run win 2k /xp /7 desktops on vb fine, though).
EDITED: 26 Oct 2010 23:57 by DSMITHHFX