MChylde, I saw some screenshots using google image thingy, and it looked like no AA was present between the tileset/background & the sprites. I'm not the one to judge though, as I haven't played it before...(link says something about high traffic)
Trust me when I say that the screenshots do not do this series any justice. Not only do they not really show off the AA, you cannot see how detailed and animated the sprites are either. The lighting in the game is really outstanding too, great use of shadows, etc. You'll have to play them to get the full effect (they play alot like the Secret of Mana series, i.e. action-rpg).