Codemasters has released a 145MB demo of IndyCar Series, which lets players race around the Texas Motor Speedway in either the Red Bull Cheever Racing or Pennzoil Panther Racing cars. As you may well know, ICS uses accurate 2002 season data from the American racing championship of the same name. You can download the demo here if you like - just make sure your PC is up to the spec listed on the same page.
IndyCar Series is also due out on PS2 and Xbox. In fact, we've just got code into the office, and might well write something about it next week. If you behave.