Lowe's is offering a $5 mail-in rebate on One Gallon containers Valspar of Signature Color Paint.
Home Depot is offering a $5 mail-in rebate on Behr Interior and exterior Paint & Primers, Decorative Finishes, Stains & WaterProofers.
The paint must be purchased this weekend by close of business on January 19, 2009. If you're not ready to start that painting project, don't worry they usually offer these rebates every holiday weekend at least through Labor Day. I've done the rebates for Memorial Day weekend and Labor Day weekend before.