You should be able to generate your coaches, players, and referees profiles by copying them from your iPhone contacts. You should also be able to email and call them from the app too.
You should also be able to mark a custom location for a field, etc. via an address or pin marker instead of latitude/longitude coordinates, for us iPod touch users. I know you can enter an address on the app, but I need to look up the address right on the map inside the app, not by exiting the app and then going to Maps and then looking the address up, copying the address from Maps and the going back to Soccer On to paste the address. The address should be automatically entered once I look it up ON THE MAP INSIDE THE APP.
Id also suggest changing the icon something much simpler, like a logo-esque soccer ball instead of a ball on top of a table (or whatever it is).
Also change the blue-sky-behind-a-ball-on-the-grass background. It just needs to be a simpler, less cornier, less cheesier background. But other than that, the UI is good. Has some bugs that need to be removed ASAP because the app crashes sometimes.
Also, you should include other stats such as yellow and red cards, as well as running a clock for a game so that when I would record a goal or some other kind of play, that play would automatically be timestamped with the time from the game clock. (e.g.: [Goal] Terry 26)