Well, it's not free, but you really oughta try Toy Story Mania. I am INSANELY hooked on this game, and it's only $4.99. If you've seen the Wii version, it's very similar to a lot of the games that are found there.
I also like the WDW Times Guide app, which I think might've been $1.99; it replaces the paper Times Guides that you find at the front of every park. Sure, it's not one that gets used every day, but on some days when I might be missing WDW a little bit, it's kinda cool to see that, for example, Off Kilter is playing today at 2:30, 3:30, 5:30, 6:30, and 7:30 (and to be able to check to see that as of next week, they're back to a 5-days-a-week schedule, so yay, I'll get to see full-band sets when I'm there for the half-marathon!

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Free Apps:
Yelp and Urbanspoon are good for finding restaurants, especially when you're out of town or in an unfamiliar area.
Shazam is awesome for identifying songs--you hold the phone toward the music source and it "listens" and IDs the song and artist for you.
The Pizza Hut app is free and you get 20% off if you use it to order.
Mark the Spot is a free app from AT&T--you use it to send messages to them when you have a dropped call or data failure; it uses GPS to determine where the problem area was. MyWireless is also from AT&T and can be used to track minutes and data usage per month.
Now Playing uses GPS to determine your location and displays all movies playing near you. When you click on the movie title, it lists all of the theatres and showtimes, as well as a synopsis of the movie and a link to watch the trailer. It also provides a link to Netflix from within the movie listing.
iConcertCal (concert calendar) syncs itself with your iTunes library and automatically lists all upcoming concerts near you by artists in the library. You can also set different cities so it doesn't always check the default one. From within an artist's concert listing, you can buy tickets, get a map to the venue, and listen to their music. This came in VERY handy when a friend and I were wandering around Houston looking for a smallish venue. You can also check an option to have it list ALL upcoming shows in whatever city you've specified, not just the ones by artists in your iTunes library.
GasBag will list nearby gas stations. So will the Geico Glovebox app; both are free. I really like the Glovebox app; it looks like it has a lot of usefulness potential, like listing all rental car or taxi places in the area, listing all service stations or tow-truck places, that kind of thing. That would have come in extremely handy when the same friend and I were broken down by the side of the highway in the middle of MO on our way to a concert in Kansas City.
If you use Twitter at all, I really like Twitterrific. And if you're a Bank of America customer, their app is quite easy to use.
Enjoy the new phone! I got mine back in June on launch day and I'm still completely in love with it.
