Hi,
how much work would it be to port the touch support (and other improvements) back to J2ME? (provided it ever supported multitouch), or alternatively to desktop Java?

while (complete enough) reimplementation of J2ME libraries exists, and therefore one can run J2ME apps natively on platforms with desktop Java, sadly it seems extremely unlikely that the same will ever happen for android's java ABI (though it would, imho, be far superior to any other approach to running android apps on other platforms)