It is probably too late now, but nonetheless:
These SOHO NAS solutions are very much in their nascency and many buyers have been gravely disappointed. The Linksys, I believe, was quite problematic, and I wish you better luck.
As the Near Fairy says, Buffalo (a bit more expensive) seems to be the only brand to really get into it, being OS-agnostic. On the other hand, if you are only going to run Windows, and you do not need it through its own IP address, it might be worth a look, particularly if you are retiring those old 160GB ATA drives.
BOFH