Post general experiences here. Post any issues to the appropriate group as questons
Our upgrade went OK. Same HA issues others have mentioned: HA not configured correctly, must remove HA from cluster then add and everything is OK.
Unresolved issue: 5 of my 2.x servers are showing 70-90+ memory usage and appear to be slowly climbing. They were in the green before the upgrade. I'll open this as another topic in the ESX 2.x forum.