Any good Java VM for LPC2xxx/AT91SAM7??

Hi,
Anybody knows of any good Open Source Java VM
suitable for LPC2xxx/AT91SAM7??
(ARM7, 256-512KB Flash, 16-32KB SRAM)

I do not need full J2SE/J2EE Compatibility.
Without the big classes/library is also OK.

Just provide me some brief idea before I get
into the details/problems on the other issues,
like:
- GNU GPL license and not BSD
- Source code in GCJ and not GCC

Thanks and Best Regards