Keeping in mind that I already have a number of apps (though I haven't gone crazy since this phone is for development).
4th and Mayor is the best 4Square app. Been using it and love it.
Geocaching - if you don't know what geocaching is, go to geocaching.com and learn more. They have a very good app, and once Mango gives access to the compass API, the app will be all you need for geocaching. Now you can do it, but it will be easier once the compass works.
The Weather Channel - has a live tile, too.
MoTweets - there is a free and a paid version. Take your pic. I think the functionality is the same, but the free version is ad supported.
I'm not a gamer, but I did download a couple. Harbor Master is the only one I've bought.
Final Approach - you're an air traffic controller.
Krashlander - this game has actually earned its developer more than 18,000 dollars by his wise use of ad banners in the game during non-play time, but removing them during play. He also earned an undisclosed (by contract) amount from one of the handset manufacturers who is going to put the game in their devices.
KeyRing - take a picture of all those discount cards you carry, and let the cashier scan your phone screen, thereby thinning your wallet, and allowing your back to heal from sitting crooked all these years.
Amazon Hunter - a free app developed by an acquaintance - take a picture of the barcode on an item, and get back pricing from Amazon.
Gas Buddy - map gas station prices based on your location. Earn entries in a drawing for free gas by reporting gas prices around you.
Netflix - yes, you can stream movies on your phone. SWEET.
Shop Savvy - take barcode pics and get results back on prices both online and in your area.
Where's my car? - mark the GPS location of your car, as well as take a picture of where it's at. Good if you find yourself in places where you are unfamiliar and have to go some distance from your car.
PlusPoints - for those of you like me, who are on Weight Watchers, this app calculates and tracks your points (this is MY app - my first to the Marketplace)
