The Android Market still may not have the sheer volume of apps that Apple enjoys, but they are quietly catching up. In March alone, over 9,000 applications were added. Of course, with more apps come more junk and redundancy, but that is to be expected. That might be a problem as it grows.
But for now, this is impressive growth and it looks like things are only getting better. The android market went from a 5,532 app increase in February to a 9,330 increase in March. Right now there are over 27,000 apps in the Android Market.