Hey ..This looks very much like the user-mode linux i used to work on. not gone thru the Xen specs but what crossbow looks like is solaris version of UML[user-mode linux] . last time i was almost killed testing free/swan on a virtual testbed using UML. gosh... matching the root filesystem version with the kernel was the biggest fight...lately had to build my own with mkrootfs :) ... best view of these virtual machines comes when you run a sniffer like ettercap on mother system .... god knows if freesco router project is still alive or not but it was a great help.... anyway guys crossbow seems promising.. will try my hand on it... This message posted from opensolaris.org