Now that you can buy movies from the iTunes Store and sync them to your iPod, the whole world is your theater. With a 30GB or 80GB iPod in hand, those movies fit comfortably next to TV shows, new iPod games, podcasts, audiobooks, photo albums, and, of course, an entire library of music - up to 20,000 songs, in fact.How much can your pocket hold? That's up to you and your iPod. It holds up to 20,000 songs, up to 25,000 photos, and up to 100 hours of video - or any combination of each. So you can browse movies on the iTunes Store, download the ones you want (Pirates of the Caribbean: The Curse of the Black Pearl, perhaps?), and then sync it to your iPod. Same goes for TV episodes, new iPod games, 99? songs, best-selling audiobooks, and an entire universe of free podcasts. Go ahead. Fill 'er up.With all that music at your fingertips, you may never want to stop listening. Lucky thing your iPod plays audio for up to 20 hours. Or, if you'd rather watch, you can feast your eyes on movies and TV shows for up to six-and-a-half hours.It might be a miracle. Otherwise, it's hard to explain exactly how 30GB of storage can fit into an iPod that's over 30% thinner than the previous fourth generation. Or how an 80GB iPod can be the same size as the 60GB model before it. However it happened, it means you can carry your entire music collection - plus a nice selection of video - absolutely everywhere you go. And a 60% brighter, more vibrant display gives your album art, photos, and video extra oomph.Finding what you want to hear among 20,000 songs could be quite a chore - unless you have an iPod. A new interface lets you search your iPod using the patented Click Wheel. And if you're a fan of live albums, classical works, or anything that sounds best when it's continuous, iPod supports gapless playback that seamlessly transitions from one song to another.