The 8800GTS with 320MB video memory has released in newegg for $299
http://www.newegg.com/Product/Product.asp?Item=N82E16814130082
http://www.newegg.com/Product/Product.asp?Item=N82E16814150171
http://www.newegg.com/Product/Product.asp?Item=N82E16814186017
http://www.newegg.com/Product/Product.asp?Item=N82E16814122021
http://www.newegg.com/Product/Product.asp?Item=N82E16814130082
http://www.newegg.com/Product/Product.asp?Item=N82E16814150171
http://www.newegg.com/Product/Product.asp?Item=N82E16814186017
http://www.newegg.com/Product/Product.asp?Item=N82E16814122021