While our storage needs are nowhere near that size, I can attest to the greatness of Bacula. The hardware part is probably up to you, but as far as software, I cannot preach this software enough. 1) It's completely cross platform in terms of systems you can pull data from. The Director and Storage Daemon run flawlessly on every distro of Linux I've tried it on (Slackware, Debian, and Fedora)... and the restores are easy as pie with some of the available interfaces. Configuration is a pain and can take awhile, but once it's set, you're done. We have 5 servers, two of which are hosted outside the company and we don't even have physical access too... I was able to set these up to work with the same backup solution as if they were local with ease. Other internal servers are Windows 2000 -> Mac OS X... all backup without issue, daily incrementals, weekly diffs, and once a month fulls.

I can't fucking believe it. Research from Berkeley that would seem to denegrate republicans.

Just out of curiosity, is "denegrate" the new Republican hot-word? I heard Bush use it about 100 times over the course of the three debates. Now it would appear that it's being used every time someone is trying to spin something to the right.