it can be installed without an SD, that's the eMMC method. tooling could probably be improved there, contributions welcome. it can't be "flashed", because it is bigger than Maemo5, and thus doesn't fit on the 256mb internal NAND different people have different priorities. I don't find it that hard to use an SD card (and apparently neither do many of our testers), I also find it reassuring that if things go wrong, I can just bump the SD and easily boot into Maemo. but: as I say, if you (or others) are interested in helping to improve installation with other techniques, I'd personally be happy to see that happen