Tamron currently has some Mail-in rebates offered on pretty much all of their lenses. One particular lens that might be of interest is Tamron's 17-50mm F/2.8 with VC (image stabilization). A much cheaper alternative if you compare to the equivalent range of Canon's 17-55mm IS which runs just over $1100 dollars. Correct me if i'm wrong, but I don't think Nikon even offers a lens in this range, with this aperture, that has Image Stabilization. Extremely helpful for those who shoot mostly video to minimize that rolling shutter / jello effect (especially on some early Nikon DSLRs). You can find more Tamron lens rebate information following the link (click here)
Tamron Lens Rebates Canon Nikon.