I have a sneaking suspicion the crack is a product of oxidation and being thrown around on the train trip. I also talked to some people about welding it and it's possible that could fix it but it would probably just crack again. The wrenches pretty much told me to get a new bike though. I found a yellow PX-10 at the SF Bike Kitchen which is awesome because you can't buy a PX-10 for 30 dollars ANYWHERE. So in keeping with the esprit de corps, I think I'm gonna go french.