It’s here – VMware Server 1.0 has been released! You can get it here.
I’ve been using the VMware Server betas for some time and it is well worth a look if you need to setup some dedicated/always on VMs. It is not quite a replacement for Workstation (in particular, with its lack of multiple snapshot support) for certain testing scenarios, but if you need to run a set of VMs always on it does the job well.
Be sure to read my earlier posting for an interoperability problem with RDP if you try to connect to a console session, as this problem may limit its usefulness if you do not use full Terminal Server (a reason to consider installing it on Windows Server 2003 instead of Windows XP).