Citrix to buy XenSource

The week of (HW) virtualization (companies) ?

Hm, too many brackets for a good title, ... anyway, just hours (ok, I'm still exaggerating) after the VMware IPO, Citrix (of all) announced that they are to by XenSource, maker of Xen, which is a rival to VMware and favored by like half of the techies. It's one of those tech-religious things, I guess.

Citrix to buy virtualization company XenSource for $500 million | Tech news blog - CNET News.com: "Citrix to buy virtualization company XenSource for $500 million"

I wonder, why Sun haven't bought them....