The only decent Bible app available is YouVersion, which does not allow downloaded bibles and requires a data/wifi connection. If Laridian or Olive Tree would do one, they could corner the market, at least for now. Links to suggest this for Laridian and Olive Tree are below:
http://blog.laridian.com/?p=766&cpage=1#comment-7528
Select a Device -- Olive Tree Support
http://blog.laridian.com/?p=766&cpage=1#comment-7528
Select a Device -- Olive Tree Support