It looks like things aren’t as smooth as they should be. According to the recent roadmap update, AMD has delayed their dual-gpu card and will be launching it in the first quarter of 2011 and not Q4, 2010 as previously expected.
Coming in Q1 2011
AMD Radeon HD 6990 Antilles
AMD Radeon HD 6500 (???) Turks
AMD Radeon HD 6300 Caicos
Picture Source: XBitLabs