JVM Choices for Windows CE in general (including Pocket PC and Windows Mobile):
- CrE-ME
- Mysaifu
- Skelmir CEEJ
If you’re looking to have a common code base between WinMo and Symbina, you might also look at Red Five Labs. They have a Symbian runtime that allows you to run COmpact Framework apps, so you could have a CF codebase that works on both. I evaluated the early betas of Red Five’s offering, but haven’t used it since, so I can’t attest to the quality or coverage.