Ok - that seemed to work, there where a few 'unknowns' there after but on looking at them they were .m4a's which I thought were supported. Unselected it as a format and after syncing (and converting) they were there perfectly!
Tomorrow - I go for a full sync, so we'll see what happens. I'm going to put 'na' in the composer field of my collection, I'll do that tonight so it should be ready in the morning.
Unknown album also loses the track tag!
Get answers about syncing the current release of MediaMonkey with iPods and other devices.