We looked at the DosONChip sold by sparkfun here?
http://www.sparkfun.com/commerce/product_info.php?products_id=8215
But in speaking to someone in the know and in doing research on this forum, it seems there are many unhappy costumers with this product.
I'm surprised sparkfun let people express their displeasure in the forum. There's a new "level1" in town, and he's cracking down on unhappy customers!