I got one of these yesterday (cost about 60 quid):
LinkSys NSLU2 (or 'SLUG')
http://tinyurl.com/229fgu
Good and has a very good user base/group but can be fiddly to do advanced stuff.
Previously I was using a generic NAS drive case that I could drop my own drive into. About 30 quid from Maplins.
Freecom seem to make good stuff on the whole so your suggestion might be your best solution.
LinkSys NSLU2 (or 'SLUG')
http://tinyurl.com/229fgu
Good and has a very good user base/group but can be fiddly to do advanced stuff.
Previously I was using a generic NAS drive case that I could drop my own drive into. About 30 quid from Maplins.
Freecom seem to make good stuff on the whole so your suggestion might be your best solution.