Your approach definitely has its advantages, though.
Sometimes we don’t get traffic directly through from our isp to cs.byu.edu, and this could be very useful for getting access (as long as you can route access through another server somewhere…)

See you in class.

You saved the day! It works out-of-the-box for me.
One just needs to add the automatic ssh login and everything is perfect!

Yes, this sounds like the right situation to use the tip I wrote about. The main thing to check is that you can somehow ssh to a machine (A) within the subnet where your windows machine (B) lives. If you can check code out on that machine (A) then this double-hop trick should work.

However where I work has several private subnets where each subnet has one dual-homed server with network cards on both the private subnet and the public/intranet one (each private subnet is a manufacturing line).

Is it possible for me to set up some knd of proxy/other that could sit on the dual homed servers that clients on the private/manufacturing subnets could use to check code in and out of a common sSVN server (on the public network..?).

You seem like the kind of person who might be able to anser a question like this!