Thanks a lot people. So far I have not used album art at all, but I might like them enough to go thru my collection and use them in N900. Didn't know how to start amassing the album covers, but now I feel it might actually be very easy.
They're maemo and MeeGo... "Meamo!" sounds like what Zorro would say to catherine zeta jones... after she slaps him for looking at her dirtily...