Has anyone tried this? How is the performance? Have you virtualized this box as well? My virtual environment won't be very large (~20 VM's) and I'd love to take advantage of the SQL 2008 install I already have on the Commserve. For reference the Commserve machine does nothing else other than manage the Commserve (which is two media agents and about 10 protected servers).
Just my 1.4 cents (after taxes)