Rik's Random Retro is currently live and streaming with his retro Athlon 2600+ Shuttle SFF box. Shuttle machines were the standard bearers for the SFF market. Even Falcon Northwest used a Shuttle system for their first SFF machines.
His specs are a Shuttle SN41G2, Athlon 2600+, 512MB RAM, and a Radeon 9700 Pro.
Check out the stream by clicking the link below!