I think I've created a bit of misunderstanding - from the emails and comments I've received it appears that people think I've already leapt into commuting both ways every day.
Fat chance! : )
In fact, after one week of work in Oshawa, the only cycling back and forth I've done at all was on Wednesday, when I did the round-trip ride which almost killed me. I don't have my own office (and therefore a safe place to lock my bike overnight) for another two weeks, so I can't do my ride there, train back, etc. thing until I get my office.
So for the next two weeks I'll probably work in a round trip ride a few times, but otherwise the great commute won't really start until the office becomes available.