Currently, there are only four teams offered--Mets, Yankees, Red Sox, and Phillies--but the press release states that additional teams will be added in the weeks to follow. So stay tuned Kansas City Royals fans.
Since its reemergence, Commodore has offered many custom paint themes, which it calls C-kins. The MLB themes feature standard C-kin pricing: $275 for a full ATX chassis and $210 for just the painted panels, which you would them slap on the Commodore PC you already own.
My Commodore PC? My Commodore was made in 1985 and it doesn't have a case. The CPU is under the keyboard and the monitor is a 13-inch television set. The baseball stuff would look pretty sweet though, especially when I'm rockin' the Lance Hafner and Microleague Baseball.