Android SDK
I’ve been developing for iPhone in my spare time for ~8 months now (jailbreak and toolchain prior to the official SDK). For the sake of trying out the competition I snagged the Android SDK and associated plugins and whatnots for Eclipse, and proceeded to implement a simple app.
My 2c is that Apple wins on most fronts (ease of use, abstraction, API, framework elegance, etc…), but Android development was straight forward enough and I do see the potential. Hopefully the competition will do the mobile platform front some good for all parties…
Android development has a long way to go, and the SDK and toolkit feels fairly hacked together IMO. I’ll probably develop for Android too, but plan to wait and see how the Android Market and G1 uptake develop before diving in completely. It just doesn’t feel as “huge” as iPhone did from the outset, so isn’t really pulling me in to the same extent.