No, this patch will not work with an n800, only an n810. There is a link in my signature for a .34-rc3 kernel for n800 which was done by tmr - however the n800 .34-rc3 patch is not against the MeeGo kernel (obviously).

No, this is a known problem. The menelaus driver has the code for the internal MMC, however it doesn't get recognized. Upstream (linux-omap) don't know why this is either.

I have not tested anything outside of my base configuration (arch/arm/configs/n810_defconfig), including sound. There was someone that got sound working for the n810, I will be seeing if I can contact him, if not I will try and get it working myself.

You need to include the p45spi driver into the config. If you look at the .33.1 kernel thread linked in my signature some people have got it working, I have not done any testing on this either and is not included in the base configuration.

I will be performing some testing on these components and making a new patch file soon.