Some already on free the train to Citrixville
If you can see your way past the inevitable puns in their posting, the folks at 360 have already put out an offer of free migration advice from Virtual Iron to the Citrix flavour of XenServer about a week ago. Since XenServer is free (baring a few hundred quid in support costs...) I cant imagine there will be too many customers sticking with Virtual Iron by the time Oracle consolidates its virtualization strategy. More about it all here:
What about Sun's xVM and VirtualBox? Are we headed for a world with only VMware, Hyper-free, and Citrix Xen? Can't believe big blue are content to sit this dance out....