The official Steam for Android application hasn't been with us all that long, but an air of controversy already surrounds its arrival. Almost all of the third-party Steam applications have disappeared from the Android Market.
If Valve happens to be involved in some way, the odd part is that the Steam API is publicly available for use. Seems a tad suspicious though.
If you're using a third-party Steam application and you like it, it's probably not a good idea to uninstall it anytime soon. (Or at the very least pull it from your system for a backup.) No word yet on whether or not any of these applications will re-appear elsewhere, so for the time being it looks like the official app is all we got.
Source: Droid Gamers