Interesting! I'd have thought that each brand would bring out certain models to beat the other's! They're very different beasts though I guess.
Lens compatibility tends to be better through the Canon range I believe?!
At entry-level I'd say Canon has a clear advantage - and oddly one that they themselves don't promote - in that all of their current lenses work on all of their current cameras (I believe).
That isn't true for Nikon and if I'd fully appreciated it I'd be writing this post as the owner of a Canon 400D -- even though I think my D40X rocks.

These figures are irrelevant because they cover the companies' entire product ranges, not just cameras. Canon have their fingers into far more pies than Nikon.I can only find annual reports for 2008 as yet: (net sales in million's of yen)
Canon 4,094,161
Nikon 955,792
Have Nikon really caught Canon up?
Sources:
http://www.nikon.com/about/ir/ir_library/ar/pdf/ar2008/08annual_e.pdf
http://www.canon.com/ir/annual/2008/report2008.pdf
I can only find annual reports for 2008 as yet: (net sales in million's of yen)
Canon 4,094,161
Nikon 955,792
Have Nikon really caught Canon up?
...
I'm a Canon user, and I find Nikon gear to be odd and awkward to handle.