The Advanced Imaging Conference (AIC 2007) was held last weekend (27th-28th October in San Jose). At the conference, SBIG made some new announcements - in particular a STX series (which is expected to be available 2nd quarter 2008).
It would appear SBIG have also made the jump to accommodate the KAI-16803 chip (16 megapixel) in their new line of cameras... This comes as a surprise considering such a large format chip makes it difficult to place a dedicated/separate guide chip in the same optical path. They achieve this with what looks like some new guiding methods. Rather cool. The KAF-8300 with its 5.4u pixel size makes a nice wide field chips (small pixels, better resolution at shorter focal lengths).
Anyway, you can check out all the info here -
http://www.sbig.com/aic2007/
Enjoy!