Well, it's the end of the day on Monday - the day they released VMware server Beta.

First things first
They call this VMware Server Beta. Now, I'm not going to bet my life on it, but this is hardly beta. VMware GSX server has been around for years and that is essentially what this product is. So, while the name may be new, the product is not!
Installation & Upgrades
I've now installed it on 3 different systems, and it's been out less than 24 hours. I installed it on my laptop and used it to run some linux VMs where I was using VMware workstation. I've also used the remote console to connect from my laptop to my remote servers running VMware.
I installed it on a staging server (Windows 2003 Web Host - Windows 2000 Server VM) where I was using an older version of GSX server and I installed it on a new Windows 2003 server running a Windows 2003 R2 VM. In both of these cases I had to upgrade existing VMs.
For the most part the upgrades went smoothly. On one I upgraded the VM from the latest version of VMware workstation VM to the VMware server VM and it worked flawlessly.
The second upgrade was where I upgraded from an old (several years old) version of GSX server. The upgrade of this VM wasn't as easy. Once I upgraded the VM it changed the CMOS and once I logged into windows it found all new hardware. Several reboots later I installed VMware tools which basically upgrades you from a 640×480 16 color experience to something more reasonable like 1024×768 32,000 colors.
For some reason, the VNware tools icon in my system tray has a red X through it. That can't be good. I'm not sure what it is, the VMware tools appear to be working.
So, if you're upgrading from an old version - make a backup first!
More coming tomorrow…
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