Although I don't yet have an ipad, I am planning on purchasing one in the near future and a friend told me about an app he uses on his call Onsong, which is the best app for worship leaders using an ipad. It will import charts and songs directly from Song Select (the library service of CCLI license holders, which avery church and ministry should have) and has all the features you need for leading worship including bluetooth technology for sharing your list with other musicians and doing page turns, pulling up songs on the fly, etc.

Jeff