Sys-Con's Virtualization Journal talks a bit about Virtual Iron 4.2:

Virtual Iron figures when its 4.2 release pops out this month it'll be the first Xen-based virtualization solution to offer such niceties as LiveSnapshots of virtual servers for hot backup and patch management [...] and virtual disks; and multi-pathing for virtual server Ethernet and Fibre Channel networks in support of business continuity and redundancy. It also includes broader operating system support - like Red Hat 5 and SUSE 10 - and packaged tools that appear to the administrator like a virtual CD.

To try Virtual Iron 4.2, request a trial from our web site.