Don't know if all these will apply for you but here are some bullets for ya...
Pros for Nikon:
-The Nikon will give you more manual control than the Canon.
-Best Shot Selector (takes several shots and selects the best one).
-In-camera Red Eye removal.
-A little more telephoto (38-114mm lens).
-Less chromatic aberration (purple fringing) in high contrast areas of a shot (e.g. tree leaves in shadow with bright sky peaking through).
-Has Manual Sharpening setting (Off, Low, Med, High), Canon has none.
-Has Manual Saturation setting (Low, Med, High), Canon has none.
-Has 15 Scene modes while the Canon has only 6.
Pros for Canon:
-Slightly Better Auto White Balance than the Nikon.
-Larger, higher definition LCD (2" 118,000 as opposed to 1.5" 110,000 pixels).
-A little wider lens (for group shots: 35-105mm lens).
-2.6fps 'til the card is full (Nikon can only do ~20 shots and then you must wait).
-Better Macro (closest focus 3cm , Nikon's closest is 4cm).
-Can focus in complete darkness with the AF Assist Lamp at close range (done this myself) Nikon misses the focus most of the time, here.
-Less Barrel Distortion than the Nikon.
-Newer technology: Faster Processor, Auto Contrast is better (Nikon's is too high), colour is more vivid (Nikon's seems flat-personal preference) and doesn't underexpose like the Nikon.
-Has the high-speed 60fps video mode (limited to 60 second clips).
Some little niggles that I gleaned from my own tests (I tested about ten cameras when making my purchase decision, over about a month and a half (worked in a camera department, so I had access to the photo-lab and had ample time to play with these models)...
Both cameras are limited to about 5"x7" for crip, high-quality enlargements. 6"x10" quality is "pretty good" (especially since most people view 6x10s from a little farther away). The Canon, of course, is limited by its MegaPixels and the Nikon is limited by having its compression set a little too high, introducing artifacts. So really, those extra mega-pixels are wasted.
Not including continuous mode (where both cameras are equal until the Nikon hits about 20 shots then stops), I found the Canon to be a faster camera overall. Focusing and waiting for the flash to charge, specifically, was noticeably slower on the Nikon. I sometimes had to wait up to 8 seconds in low light for the Nikon to finish charging and focus before I could take another shot.
The Nikon felt more comfortable in the hand and was easier to jump in and start messing with the menus. Nikon's menu system is excellent for someone who's never picked one up before. The Canon's takes a little to get used to but then becomes very intuitive (and requiring less button pushes to get what you want).
The Nikon uses Quicktime format for movies while the Canon uses MJPEG, avi format.
Both cameras have aluminum bodies but the Canon is lighter and smaller if that matters.
Hope that helped!