Ayslin or Aislyn are nice. as a freak for Irish names, I always have a fear of the next name that will be "Caitlinized" or use an English pronunciation of an Irish name. Aislinn seems to be the next in line, although I found these alternate forms in the SSA list from last year:
Aislinn, Aislynn, Aislyn, Aislin, Acelynn, Acelyn, Aslynn, Aslyn, Aizlyn, Aizlynn, Azelyn, Acelin, Aslin, Iselin, Aisleen, Icelynn
Obviously not all of these are pronounced ACE-linn, but you can see what some other people are doing!