What Xbox Games Will Be Backwards Compatible?

alvinrod writes "IGN has whipped up a nice article about how and which Xbox games will be compatible with the Xbox 360. The article explains that Microsoft is using emulation to play old Xbox games rather than including the chipset from the original Xbox. From the article: 'Xbox 360 compatible games are going to be decided on a case-by-case basis. Microsoft's engineer's are, right now, figuring out which games are compatible, and which are less than compatible. Thus, at the 360 launch, only a few games, let's speculate that number is somewhere between five and 20, will be backward compatible.'"