OK so here it is. I can only verify it still works with Kingston 2GB MMCmobile. Take it as highly experimental one. It did not crash for me so far (hour or so) when booted from card and swap enabled. I have not tested it with any SD or SDHC card.

Both MMC 4.1 and SD high speed mode is in, SDHC too. Basically it is merge of MMC layer from latest N800 2.6.18 kernel (osso55) so there are more generic MMC layer changes which may improve stability or break things. It may be worth of trying also for people who tried my high speed kernel before and it was not stable with their card. Also people who reported complete lockup at boot until card is removed may see some difference, card detection runs in its own thread in 2.6.18.

What is not in yet is the delayed card poweroff a.k.a. SDHC card corruption fix. I'm not sure it helps on N770 but maybe yes, I'll investigate.

Any report with SDHC cards in 770 and this kernel is welcomed :-)

Beware that high speed SD mode (48MHz) may not work with some less tolerant SD cards just like it is with high speed MMC mode. There may be reasons why Nokia limited MMC bus in 770 to 12MHz.

I'll post links to kernel source diffs tomorrow, going to bed now.