Thanks chaps. I'll give the first suggestion a try, if that doesn't work then I'll go with Windows. How much RAM did you find it needed running on WIndows to work 'ok'? My test platform is a HP microserver so resource is limited.
I too am trying to get XenDesktop running properly. Bit of a PITA. I have it half working at the moment. I really can't see why it won't interface directly with ESXi rather than requiring vCenter.
Did you have to do anything else to get things running? I saw somthing about having to add /sdk to the appliance?