Here are two more contenders for future server hardware:
http://www.linutop.com/linutop3.en.html
340 EUR
http://www.linutop.com/linutop4.en.html
380 EUR
These two are very similar, differing primarily in power consumption and connectivity. Both consume more power than the Fit PC3, and both are less powerful machines, especially in terms of CPU.
However the Linutop3 is slightly cheaper than the FitPC (about £9), and are more widely used and tested in Europe.
Fit PC3 is still #1 contender for new server hardware in my view.
Sam.