Chad Sakac, VMware extraordinaire @ EMC is showing the vSphere 4.1 SIOC implementation running on the CX4 mid-range line. The new features included in FLARE 30 are really interesting.

An incredibly cool undersea cable map, with every kind of informations on them, it's amazing.

A really cool blog, right now focused on ThinApp and VCAP-DCA study.

A really comprehensive guide to VMware snapshot troubleshooting, it contains everything and is really well written.

A great Hitachi / HDS history overview made by Chris Mellor, I worked with HDS as a VAR for the last 5 years and I always found them on the conservative side of things, they struggled to respond to quickly evolving platforms (like Linux support for HDLM), they make nice hardware though.

Duncan Epping show another improvement made with vSphere 4.1 in DRS and HA interaction when failover occurs.