As if DirecTV customers didn't already have three good reasons to party down this week, the satcaster has just announced that its MLB Extra Innings SuperFan service will be four times better than last year. Or, there will be around four times more games in HD each week -- same difference, right? During the 2008 season, subscribers to the SuperFan package will be able to catch up to 40 out-of-market matchups in high-definition, and for the first time ever, the so-called Strike Zone Channel will be available in HD. 'Course, the interactive Game Mix channel, which shows up to eight tilts on a single screen, will be back (in SD, sadly) to satisfy popular demand. Those interested in getting signed up can save a few bucks by doing so before April 6th ($179), and current Extra Innings subscribers can upgrade to SuperFan for $50.