I've created a site that lets us collate Xbox 360 drive data in a more structured way. The list includes the most important fields like, core or premium pack, mfg date, lot and team number, dvd drive of course, country and where it was purchased. This allows us to find any trends that might hide in these numbers and make it easier to spot Xbox 360 Core or Premium packs with Toshiba-Samsung or Hitachi-LG drives.
Check out
http://www.360drives.com/Submit your information to get the site going.
-ivc