Free shipping, no tax in most states.
Price is net of $21 cash rebate offered by BCB. BCB rebates pay out within 60 days of purchase.
This is currently the lowest price anywhere on this kit that includes a warranty.
Caveats: the T2i is around the corner, but the T1i will stay on as Canon's entry level Rebel, bumping the XSi.
Also, the lowest price seller accepts returns, though there is a 15% restock fee for opened merchandise.