http://www.commodoreusa.net/CUSA_Store.aspx
Vic slim looks the best and is pretty good value. I bought a small dell which gets hot and sounds like a 707 taking off from ebay for the missus - the Vic slim looks (and probably sounds) much nicer! Dual Atom is probably better user experience than single (albiet fast) celeron.
I might get one anyway and resell the optiplex!