I have had my iPhone now for about 4 months and I am hooked on a few of the apps I have downloaded. Here are my favorites.
Angry Birds - Without doubt the best iPhone game app evarrr!!! Cheap at $1.19 and all the new level updates are free.
Fruit Ninja - Another highly addictive game where you slice up fruit with your finger as it flies through the air. Watch out for the bombs. Its a really good stress reliever and once again cheap at only $1.19.
Chess with friends free & Words with friends free - Both great games for playing other friends with iPhones in Chess and Scrabble. With both being free they are excellent value if you can put up with the odd advertisement popping up. If anyone wants to challenge me in either, PM me and I'll give you my username.
Food Advisor - Ever wanted to know if your local take away is on the health inspectors hit list? Food adviser lets you know along with a whole heap of other food information.
ABC App (Australian Broadcasting Corporation) - Probably the best TV/Radio station app out there
Flick Kick Rugby & Flick Kick AFL - Want to kick goals like Richo?
Highly addicitve flick kick games for both Rugby and AFL. Both use the same engine so the rugby one just has no point posts.
All recipies AU - Really good cook book app with meal planners and heaps of recipes. If you're feeling adventurous you can even spin the wheel on the "dinner spinner" and cook whatever comes up.
Talking Tom - My kids love this app. Essentially its a little animated cat that mimics everything you say in an altered voice. You can even record what it says and upload it to youtube or facebook.
Sleep Cycle alarm clock - this alarm clock is amazing. It senses your body movements throughout the night and the alarm triggers when you are sleeping the lightest within a time frame you set.
Shazam - For those times you hear a song on the radio and don't know what the name of it is. Just turn on shazam and it will tell you the songs name by sampling it.