I have problem with SoftwareUpdate in snapshot - can't install the the bootlogo and (I think) upgrade all *.ipk from SoftwareUpdate is stopped ...
I try install by hand oryginal bootlogo from DMM, and bootlogo from NN2 - Ican"t install ..
And info:

Upgrading newnigma2-bootlogo on flash from 8.1.20110624-r3 to 8.1.20110625-r3..
mount: can't find /boot in /proc/mounts
preinst script returned status 1
Collected errors:
* Aborting installation of newnigma2-bootlogo
* Cannot find package newnigma2-bootlogo.
>>> DONE <<<

No support for Multiboot , install the image in the flash and the update will work.