uy.com is listing an AMD Radeon HD 3870 card for pre-order on its website for pre-order and it's apparently from Best Data which is the company behind Diamond Multimedia. There's no picture of the card an there are very few specs up, but the card will have GDDR4 memory and support for HDMI. It will most likely be a reference design for now and it's listed to have two DVI ports.
The pricing is quite high at US$268.99, especially considering that the MSRP is meant to be US$249 or possibly less. It looks like the online retailers are already trying to cash in on this unreleased product, which is not unusual. With the current shortage of GeForce 8800 GT cards on the market, AMD might have a chance if the company has cards ready to go on the launch day.
Buy.com is also listing a Radeon HD 3850 with 256MB GDDR3 for US$217.99 which also seems a bit steep, considering that these cards are meant to sell for as little as US$149.
You can find the Buy.com page here if it hasn't been removed