I'd like to see this, too...see my post from a few weeks ago:
http://forum.sun.com/jive/thread.jspa?threadID=108694&tstart=0
But, as I've given it more thought, I'm not convinced that virtualization would be a "better" option." Cheaper, maybe, but not necessarily better.
A couple of SunPCi cards and the right OS support drivers (MAC OS X, Solaris x86, *BSD...other x86 OSes? Oh, yeah...winduhs) in a U20 or U40 would make a killer cross-platform development box or interoperability workbench. Counting the host system, you could have two or three environments running simultaneously, each with its own dedicated CPU, memory, monitor, and network and USB ports, all in one box!
Since the SunPCi card already exists, it seems to be just a few drivers away from being a sweet x86 interoperability solution. Virtualization, schmirtualization; noone else has anything like this.
gmack
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