Fast installer will send free apps directly to your phone, paid apps will be lined up so that when you sync your phone AppBrain app, you will be given the option to install and be taken to the Android Market to effect the purchases (so you will need payment method set up in Android Market ... the first ever Android Market purchase can take some time to "Authenticate" but once one purchase has been made, things are pretty instant). With the OTA delivery of apps AppBrain has become my primary method of getting apps for my phone. Use the same credentials for Android Market and AppBrain.