ah btw, my dockstar has gigabit ethernet. and my iomega iconnect does too. the bottleneck is always USB 2.0 for me, but there are two-core NAS nowadays at Aldi for 50 euros (with SATA and gige).
I think there's a lot to chose from if you're willing to write the drivers. The mk802 seems very promising to me. I gave up on the rasberry scammers. sent from my windows 98.