home-brew iDisk Server??

I know this has been roughly covered in a few places a while back... there were some way-cryptic notes about setting up an iDisk here: http://www.drijf.net/dototto/wwwmac.html But frankly, I could never get it to work... I'd REALLY like to use my own server as a Backup server, simply because I think that the Backup software that Apple has is about the coolest and simplest product out there... I've tried lots of others and they all have me tearing my hair out. How about it? Anyone managed to get their own iDisk server working?