The seagate BLACK NAS 1 2 TB external seems nice, but after reading reviews I am skeptical of almost EVERY external with lan capabilities right now, and like you said. SLOW.
I have a WD mybook elite 2TB for my .ISO movie files, its doing ok so far, but USB only.
I was thinking of doing what you are doing but eventually settled on, physically moving the external and cable when data is needed by other computer.
