Android app icon design

I'm developing a word game for Android. (An iPhone version will follow.)

To start with, I need a new, original app icon. It should be provided in the various sizes recommended by the Android guidelines (http://developer.android.com/guide/practices/ui_guidelines/icon_design_launcher.html#size) i.e. 512x512, 36x36, 48x48, 72x72, and 96x96 PNGs, plus your original vector versions.

(I'll need more icons and probably some other designs later, this is only the first bit.)