Basically, this job is as easy as:
Dumping is explained here, and I won't go into detail because I wasn't the one doing it, Roman did it (I ain't touching a BSD box, more harm than good would result).
However, step two is in my ballpark, because the repository is moving to a Windows box. Two commands and you are up and running again (it can take quite some time, especially if your dump is like mine - a little over 528 MB!)
svnadmin create c:\repositories\fidalgosvnadmin load c:\repositories\fidalgo < "e:\fidalgo.dump"
All that is left to do now is to restore the configuration and hooks (details in my last blog post on Subversion)
In closing, credit where credit is due: I gathered some inspiration from the following blog entry: A Rank Amateur Upgrades His Subversion Repository