Network Attached Storage

Firstly I know that what I'm looking for can be done DIY with pretty much any Linux distribution but the solution should be something that survives if I'm gone.

I'm looking for a Network Attached Storage(NAS) solution. It will need to support SMB, NFS, FTP and HTTP have a built in or easily attached tape backup, have at lease a web based administration and be a plug in and forgetabout it, except for changing daily tape backups. There should also be at lease 2 drives RAID'd for redundacy. Linksys has something close, the EtherFast� Network Attached Storage but no apparent tape backup option.

So anyone have some good suggestions?