I suppose I will throw it out there that I have figured out how to do this. It worked very well, although I still need to eliminate duplicate members by hand (there does not seem to be a way to merge the accounts offhand, but for what I did, I didn’t have to worry about it). You can see the results at Campus Dakota – Forums for university students at UND and NDSU.
I will do this for other people, if they pay me, price negotiable. This is about all ther advertising I am going to do for it though–I’m busy enough right now as it is, but I need money too.
UPDATE: Since I keep getting requests at SMF, I just posted the script. If you like it, please drop me a line (and maybe a dollar or two for all the time I saved you). Look at the script here.