Ask Slashdot: Linux Diskless Clients?

Graymalkin asks: "I was wondering if there is a Linux program (or many programs) that would let me have a single server on a LAN and then a bunch of diskless clients. I'd like to make the clients have a motherboard, memory, a processor, and a NIC and get all their info from the server. If possible I'd also like to have all the networked stuff loaded into the server's memory so there's as few disk read/writes as possible. Can I do this?"