Yes, I'm pretty sure those rims are compatible with canti brakes.
Mconclonx - I am planning to do the work myself. I'm somewhat of an amateur, but I've stripped and rebuilt a couple of bikes in my time, so feel fairly confident that I'll not have much issue building this.
The frame I'm going to build up is a surly cross check and has horizontal drop outs so should fit fine.
I agree that if I was to offer the whole build to my lbs I might stand to save money, but I'll be buying parts as and when they come available to me (i.e. When I find more money / stuff on eBay), so I'm almost certainly best off building it myself.
My main point was weather the wheels alone were best built by a local wheelbuilder, or ordered complete, as per the ones in the link.
Thanks again, Jack.