Hello
best bet is to check out the architecture planning guide here
http://www.vmware.com/support/pubs/view_pubs.html
As with bandwidth it is quite fluid. Static images will use no bandwidth. Basically for 4.6 and earlier you are looking at an average of 150-200kb/s and it can spike up to 7Mb/s (with a zero client using AES-128 encryption) However with view 5 this was meant to be reduced to around an average of 65kb/s (anecdotal, i have no evidence of this). Limits can be set by group policy and zero client profiles (if you are using zero clients).
Ram and CPU also quite fluid. On average you will try and set 1GB ram and 1 vcpu per desktop but the way the server handles share memory pages they actually use less than this. Machines spend a lot of time with their CPU's idle.
I hope this has helped somehow
Cheers
Phil
VCA4-DT