Thanks for the thread. The "heel shifting" was really cool!

I've looked at the frames available to me currently. The only one really worth looking at is an old Trek 750. However, I'm not sure it'll have the bosses/clearance that I'm looking for in a commuter. I haven't even looked at dropout spacing.

The other option is to buy a new frame. I was looking at some surly frames. They're basically classic frame geometries with modern amenities, in steel, of course. I was looking at the cross check and straggler. (They're identical except the straggler has disk brake mounts.) Do I want to spend the extra money just to have a disk brake up front... does it matter that much... I'm not sure. This is all preliminary of course. I'm still not sure if I even want to bother! The N+1 itch has caught me...