guys.. I am currently on 2.1 (unjailbroken..) n m loving it for its crispness.. Also, the itunes backup works so damn well.. earlier it used to take hours n now the same happens in 5 mins.. Just few queries.. Does a 2.1 jailbreak loses its fast backup property in itunes?? and will a 2.1 jailbreak make the ipod touch a lil slower??