* Alessandro Perilli has been running the European-based Virtualization.Info since 2003. Lots of good stuff here, too. While his site is more of a clearinghouse on virtualization news and analysis, there is a strong blog vibe with guest writers, generous speculation about vendors and the industry, snazzy infographics, and a strong serving of opinion.
* Robert Larson hosts a sporadic virtualization blog, with one heck of a nice write up on Building a Hyper-V Cluster from back in December. Ten steps, many screen shots. Larson is sometimes sparse on updates, but his stuff is good.
* Mitchell Ashley publishes The Converging Network, offering his views on virtualization and other things IT. I try to tune in once a week to see what he's up to.
And on to my prime vendor sites:
* Ben Rudolph is the main hand on the Parallels corporate blog. His title is director of corporate communications, but "Chief Evangelist" may be more apt. Check this out if you're curious about virtualizing your Mac.
* VMTN is the VMware Technology Network Blog: All VWware, all the time. Good community input.
* Microsoft Server Division Weblog
* Microsoft Server Division Weblog-- Everything you need to know about 2008 and Hyper-V (I still want to say that in a French accent.) Mike Neil, Patrick O'Rourke, and other folks on the Server 2008 team give a refreshingly unfiltered take on all things Microsoft. The blog averages about 10 or so posts a month. My favorite recent bit: bashing analysts who claimed Hyper-V is Xen-based.
* Finally, the folks at VirtualIron have a good mix of self-promotion and gearhead information (including how-tos) and virt industry commentary offered up at their blog. Surprisingly good stuff from a vendor site.
Please don't take it personally if I neglected your site. There are many, many, many people writing good content on the topic. There are plenty of vendors making excellent use of the medium to improve customer communication and to improve the virtualization marketplace in general. My wife just got me a T-shirt to keep hubris in check. The caption: More people have read this shirt than my blog.