We've already started the migration. I've been running kqemu virtual machines under the beta release of Fedora 12 and I must say I
extremely impressed, both with performance and the management GUI. You should defininitely check it out. We've moved our development off of ESXi and we're currently qualifying our server images under kqemu in order to move them over, too.
Of course, lack of linux VI client wasn't the only reason for this move. Frankly, the more I worked with ESX, the more I was annoyed with not having a real OS I could use at the hypervisor layer to manage my VMs. But lack of VI was the kick in the pants to really start the migration.
Good job, VMWare, way to run off your customers. But, I'm sure the $30K/yr we've been paying for licenses isn't that important to you.
I like the new logo, though.