Suggestion: iPad/(iPhone?) Bible Navigation

I thought I'd put this here as well to see if it gets more traction than in the Suggestions forum:

Huge disclaimer: I've never used the iPhone app, so if something like
this has already been implemented, please forgive my ignorance.

With that background, it may seem to make little sense as to why I
would be making a suggestion regarding the iPad app, but here's the
deal:

I was sitting in church this morning, using library.logos.com on my
Blackberry 8830 to follow the sermon.  This is currently my only avenue
for mobile Logos access until the iPad comes out (and until I save up to
purchase one.)  Aaaanyway, I found that the biggest obstacle to using
my Blackberry as my primary Bible in church was the navigation of the
Bible as the pastor had us turn to various passages and
cross-references.  While bouncing around in a paper Bible is trivial, I
found it to be very cumbersome on the Blackberry (navigate back up to
the passage box, enter the new passage on the keypad, wait for the
passage to load, by which time the pastor is almost done reading the
passage from his paper Bible.)

So I was thinking that I sure hope that navigation would be better
once I get an iPad.  I was thinking of two different navigation methods,
either one of which could/should rival the speed of competently
navigating a paper Bible:

1) Having some sort of "tab system" down the side (similar to Bible
tabs [which I don't use on a paper Bible, but would make sense on an
electronic one since you can't intuitively "flip" to the right place in
the Bible]) that would allow you to "swipe" to flip to another book and
then another chapter in the Bible.  I imagine this wouldn't work on the
iPhone due to space limitations, but I would think the bigger screen of
the iPad would be able to accommodate a system like this.

2) Having a "navigate" button always visible in the upper-right
corner (or wherever) that, when clicked, would show a full screen of
buttons...one for each book of the Bible...that would operate in a
"drill down" fashion.  In other words, if you clicked on Genesis, the
books of the Bible buttons would be replaced with 50 numbered
buttons...one for each chapter in Genesis.  With this method, three
button presses would take you to the book and chapter you are wanting to
navigate to.  If the navigation needed to be more specific than that, I
suppose you could add another layer to the drill down that is either
divided by pericope or verse...but I would think that 95% of the time
drill down to chapter would be adequate.

Again, if a really quick and simple navigation system has already
been implemented in the iPhone (and soon to be iPad) app, then please
forgive my ignorance.  If not, and if you like one of my ideas, you can
thank me with a free iPad.  (Just kidding LOL)

What do you guys think?