XBMC & Broadcom Bring 1080p Decode Upgrade to ill-equipped netbooks, nettops
 

The Crystal HD chip is currently available on mini PCIe cards, and is expected to make its way to ExpressCard and PCIe x1 cards in the future. This is huge because many netbooks, nettops and existing devices like the AppleTV or Mac Mini have at least one mini PCIe slot. A $69 mini PCIe card (or $25 on eBay) with the Crystal HD chip on it plus the next version of XBMC can enable full 1080p playback on any of these machines that would otherwise not be able to play high def video. Not to mention that you can get some of these devices second hand or refurbished for much less than the cost of a new ION system.

http://www.anandtech.com/gadgets/showdoc.aspx?i=3701