Hm.....

The big issue with NW is that you have to purchase a non-discounted fare in order to upgrade with miles, and its still maybe 50/50 at best.

It seems like with CO (from their website), I would have a reasonable shot at it; however, I would have to pay a "service" fee. That being said, RT+SVC+Miles is still a lot cheaper than BF in my area.

So essentially, I'm reading this that if I want to fly BF, I might as well just buy the ticket or cash in a reward for BF, because intl. upgrades are not going to happen?