A third of the apps are paid. It doesn’t mention the ratio for downloads, which should be noticeably lower for paid apps.
65,000 new apps since September 2010. Consequence: Hard to get noticed. Very hard.
Even though the most popular category is called Entertainment, most of that is obviously games.
blog.androidzoom.com-docs-2010-AndroidMarketZOOM-byAndroidzoom_ENG.pdf