Jetway is one of the many partners that plan to officially introduce a Radeon HD 2900 XT card. Don't be too excited about it as this is a reference card with a Jetway sticker or it.
It will still do the job, as this card won't be any slower than the reference ones. It should be available tomorrow 15.00 Central European Time, but it wont be the only one.
This card is clocked at the reference speed of 742 MHz core and 1650 MHz memory.