I ran across a mention of an assember/disassember pair for Dalvik in an XDA Forum posting. Just had a chance to give at least the assembler a try and make sure I could get things working before I posted. Yep, working on the emulator at least. There are a few examples you can start with, instructions for assembling and running are in the comments. And some pages in the wiki that look like they’ll provide some great starting points.