We've found through AdM+Partners that Kada Systems has released a MIDP 2.0 KVM on the Windows 2000, Pocket PC Windows Mobile 2003 and Pocket PC 2002 platforms. The Kada Mobile Platform is currently available for Pocket PC and Pocket PC 2002 based Strong ARM devices.
Support for Windows Mobile SmartPhone and Palm OS 4.0 will follow soon. A developer kit is available for US$695, but a 30 trial can be downloaded by signing up on their website.