They're two very capable cameras. The Nikon has the better auto-focus for tracking moving objects and the Canon has the better high-iso(better for low light shots without a flash). The lens suggestions would be the Nikon 55-200VR or the Canon 55-250IS. I would also think about, later if desired, a 50mm F1.8 lens for indoor shots. They're very cheap, around $100.

If you plan on only getting two lens and not delving into photography much then let me make this more difficult. With your needs I'd probably buy the Pentax k-x over both of those cameras. It has more features and better high iso's than both of them. That's what I'd do and I shoot Canon.

http://www.amazon.com/Pentax-K-x-2-7-inch-18-55mm-55-300mm/dp/B002OEBTCS/ref=sr_1_6?ie=UTF8&s=electronics&qid=1281644104&sr=8-6