I’m still trying to get VMWare 3.5 installed completely and servers virtualised. But utlimately it would be nice to use vSphere4 in the end.
Heres a good PDF showing the new features and how the licencing works (which has been made a bit more complicated! 
)
http://www.boche.net/blog/wp-content/uploads/2009/VsphereData.pdf
I came across this company that offers a Xen VPS hosted linux based server for a low monthly cost. Its a full root access machine so once its setup you can do what you want with it. Its what this blog runs on and what i use for other geeky projects You also get a control panel to manage all your linode (linux nodes) through too, quite neat. To check it out head here: http://www.linode.com/