I'm not sure how to code it (could do a windows side of things, but not linux)

However, I do ave a need for the n900 to sync direct to network storage (NAS), so would prefer if there was no 'pc' sat in the middle controlling the sync process.

I fully agree with syncing of photos and all other media too (i especially want my mp3's), but it should also have the ability to choose what items to sync if possilbe