Some good points have been made regarding the Nikon/Canon debate. There is no doubt that Canon has the lion's share of the pro market at the moment, and there has been a trickle-down effect (with regards to the technology) into the consumer models. I think the Nikon/Canon ranges are so close in performance and capability that the real decision should be made from the ergonomics point of view.
I've mooched between Canon and Nikon for 35 years, and it's all about what gets you the shot. Which is the most intuitive and "transparent" camera for you? Which controls fall under your hand more readily? I like a bigger camera... my old 35mm bodies always had a motor drive fitted. For me, the Nikon D2 felt right... for someone else, the Canon does.
Don't get hung up on pixel count... unless you're cropping a small portion of the frame for a poster size print the more-is-always-better argument is pretty bogus (IMHO). All you'll end up doing is filling memory cards more quickly & jamming up your hard drive (especially if you do the right thing and shoot RAW). Post-processing with the massive files can take a lifetime unless you've got a mega-fast platform.
Spend your money on good glass rather than more pixels. Be relatively critical of whatever is offered as the standard "kit" lens... consider and upgrade. Look at what your shooting and see what you want... remember that different cameras/models may have different crop factors, so an 18-70 type of lens won't give you the same range on all cameras. I'd always suggest a good mid-range zoom, especially when traveling light on a bike.
It's about the image, not the hardware. That being said, this is a brand-focussed site, so maybe we're all a little partisan by nature

It's easy for me to say that it doesn't really matter if it's Nikon or Canon, but to someone else that may be like saying Triumph or Ducati... makes no difference
