I'm running maemo off of flash and deblet off the mmc card, the internal 2GB is just for storing stuff atm.
Speaking of which, I had a couple of thoughts on 'best practices":
1. Shouldn't we kinda recommend installing to mmc? Given the limited number of write cycles, I'd hate to burn up the internal (non-replaceable) storage on the device instead of a (relatively) cheap mini or micro mmc card.
2. Wouldn't ext2 be a better choice for the fs? It seems to me that using a journalling filesystem eats up a lot of write cycles unnecessarily- it's definitely a better filesystem overall, but in this specific case I'd think that ext2 would be a better choice than ext3.