best thin client virtualization

anyone have general details of the hardware and software/license/os issues or solutions they've researched, implemented or shoot at involving thin client access to user profiles/os from a centralized server over the LAN?

off the top of my head here is the case I thought of:
1. there are linux clients that can access a remote windows desktop.
2. you can probably use a cheap mini atx or maybe gumstix to plug in the monitor/kb/mouse that sits on the desktop that has a extra usb port or two.

a.1. If I'm not mistaken for fast, ample, scalable storage and best performance you probably would avoid virtualization products alltogether like vmware or citrix and simply have a san connected to your centralized server. opinion..?

b.2. having a redundant gigabit nics per each server on a gbit network could potentially provide enough bandwidth for 100 clients per nic as long as users aren't watching youtube?