Tuesdays are typically the day the Apple reserves to make big announcements, and today was such a day for Apple. Steve Jobs took to the stage Yerba Buena Center in San Francisco to announce a number of new iPod-related products and new iTunes features. Apple billed the press event as “Let’s Rock.” Here’s what’s new: iTunes will start offering some TV shows in HD format for $2.99 (SD shows stay at $1.99).NBC is coming back to iTunes. Which means shows such as The Office, 30 Rock, and Battlestar Galactica will