Apple's dev kit was free until v4, and is now priced at a whopping $4.99. With that, you get easy access to a huge amount of resources for learning, and a thriving community to boot. The eclipse dev kit and the android development plugin is free, and again you get a huge number of example, a community, and support.
What you don't get from either is jerked around for $200 before you can even poke your head in the door. With iOS and Android, you can develop to your heart's content for free, and if you decide you've got something that you want to publish, you can do it after paying the $99 (Apple) or $25 (Android).
If that's too expensive, shift your focus to Android development. You can release you APK for free, and anyone can install after downloading it from your own website.