We’ve seen two updates to Android in the first half of the year. Get ready for another pair over the next 6 months. According to Mobile Crunch, we’ll be seeing a minor update and a major update before the year is out.
We saw a minor in the upgrade from 1.0 to 1.1 and the major update was 1.1 to 1.5 (Cupcake). It’s widely assumed that the next major update will be Donut (2.0).