EDIT:There is a new Emu, the vGBX, planned to be launched in November. This is the same creator of the vNES emu we grew to love.
It serves the same purpose as to offer a Java based emulator to successfully run in web browsers and numerous portable devices.
Yes folks, you will be able to emulate all your favorite GB/GBC/GBA games on most java based portable devices.
Credit goes to Mdkcheatz:
Here is the soon to be homepage @: vGBX