Another rumor has it that there'll be a 3G iPhone in Canada next month with reasonable data costs over at the Apple blog. The $7 unlimited data plan they predict sounds very good, especially compared to the $97 for 25mb that they currently have. This combined with an upgraded / tweaked iPhone, maybe a 32mb version, and I'm there. I love my iPod Touch, but would love to combine it with my phone for one less bit to carry around :)
Course, all this depends on a new iPhone, a 3G version, and Rogers not to completely shaft us Canadians with data plan pricing.