With an open source platform such as Android, there are going to be other sources for application downloads. One site that has started offering downloads for Android rather quickly is Phoload. Free games anyone?
Phoload who has offered plenty of games and applications for many different platforms and handsets in the past, is now expanding their reach to the Android platform. T-Mobile G1 users may now navigate to the site and download applications directly through the browser and save them to your handset. Users can also rate, view and even recommend any software that they download.
When you access the site through your mobile browser, it will automatically detect your device and filter the applications accordingly. Eventually there will be so many different locations to download applications from that it will get very confusing. We hope one day to get an application that will organize all of the sources in one convenient downloader such as the Installer app for the iPhone.