Sun/oracle also do an ultra thin client as above, I can recommend these sun units. They are the sunray 2, although the sunray3 is out now. If you need any further info or to hear how they work for us feel free to pm me. We use terminal services with these, it works very well for us. However they work well for vdi aswell.
Originally Posted by Axel
If you need to speak to a supplier for these units i can put you in touch with one on edugeek.