The day shopping goes crazy? I think so. By the way, did you know why it's called Black Friday? The name originated in Philadelphia, where it originally was used to describe the heavy and disruptive pedestrian and vehicle traffic which would occur on the day after Thanksgiving.
Here are some sites where you can make good savings. I have linked directly to the deals, or mentioned the promo code below. I get emailed promo codes and deals from all over - let me know if there is a niche or category you are looking for deals for. I might be able to help.
Shop Musician's Friend for Black Friday Doorbuster deals on Electric Guitars. Tons of deals here.
Black Friday - Cyber Monday has officially started at Armor Gold ! All Premium US hand-made Instrument, Pedal Patch, and Speaker cables are on SALE! We are also providing FREE U.S. Shipping on all orders! Ends Monday 11/26 at 11:59 PM PST.
StringsAndBeyond - Just enter coupon code save15 during order checkout.