OK, I could say quite a lot about photography, but I will keep it short.
1. Yes, Canon vs. Nikon is lighting the fuse on TNT.
2. Point-and-Shoot? Canon; SLR? That's a bit tougher to answer.
3. Why? Canon Point-and-Shoots in general deliver better quality than Nikons and are much more intuitive to use. In addition, they offer INSANE amounts of bang-for-your-buck. SLRs on the other hand...
4. Nikon SLR = more durable, excellent color delivery, dedicated controls (Nikon D200)
5. Canon SLR = better lens selection, sharper photos, less expensive (Canon EOS Digital Rebel XT)
6. Good website for starting on photography: kenrockwell.com
Incidentally, if you aren't absolutely FIXED on Canon or Nikon, I would strongly suggest you have a look at alternatives like Sony or Olympus, (if colour is your thing, Fuji)...
I have Canon EOS Digital Rebel XT (excellent bang for your buck, crispness A+),
Photographer Twin has Nikon D200 (expensive, but INSANE quality),
Stepfather has Sony DSC-H5 (AMAZING, one reservation, NOT A PROPIETARY BATT!!!!),
Pal has Kodak EasyShare MegaZoom (a little older),
ex-girlfriend has Kodak EasyShare C310 (older) and new Fuji P&S (holy cow, bang for your buck is unbeatable; $100 gets you everything except a viewfinder and manual controls)
Friend has Kodak EasyShare DX7630 (older, hard to find)
...enuff of this... :buffing: