Did you get tried an app and want to uninstall it from your phone? No worries, follow the steps below and you will be all set!
Launch the Market
Hit Menu > Downloads if you start out on the home screen
Apps are arranged by latest update. So, scroll through the list to find the app you want nothing more to do with and click it In the lower right, there is an "Uninstall" button. Click it and a window will pop up asking you to confirm your choice. Hit "Ok" and you are done
It's that simple. For users wanting a bit more info, you can go into Menu > Settings > Applications > Manage Applications. After clicking on the app, you will see a screen full of data about space used and permissions. Again, there is a handy "uninstall" button on this screen. For those on Froyo, you can also move apps to the SD card from here.