69 total cars (including backups)
38 separate entries (including some surprises)
25 drivers named thus far (including Ryan Briscoe!)
BTW...there is word here that Buddy Lazier might drive the third Panther entry.
Here is the link from the IMS website, and it has a link to the official list:
http://www.indianapolismotorspeedway...?story_id=8581