Well, we're upon the start of the 2004 open-wheel season.... The IRL runs Homestead this Sunday. Here's an article that covers who will be racing for them this year....
http://sports.espn.go.com/rpm/news/story?id=1739432
F-1 races the following Sunday in Melbourne and then the following weekend is ChampCar's spring-training at Laguna Seca. Let the fun begin....