funny you mentoin SDHC, do a search in the 2.6.20 changelogs for the lin kernel
btw SD card specs say the cards have to be backwards compatible, they will operate at the slower speeds however as the dell pda users know not all SD cards are created equal
i here there is an arm port of fedora around, id be intrested in giving that a go (i just find unbuntu really really slow, for me there is no real diffrence between ubuntu and fedora except that fedora has a theme that i like more)
i hear the precompiled binary distros bassed on gentoo are becomming a bit more common. perhaps the russians should team up with the nsul guys as they have a compile farm of arm servers (distcc, on 233Mhz procs with 64MB a peice and huge swap + / disk)
i think gentoo is more like OE, except OE dosent call itself a distro . a binary version of gentoo would be very intresting and portage has support for binary mirrors