Here's a cool new recently added feature included in iGigbook.
It's a Fakebook of chord changes to 1200 popular songs standards.
The big appeal is that iGigbook will transpose and display this Fakebook's chords
and display the chart in any given key specified by you, and on the fly. You simply need to be connected to the internet via wifi or 3g when transposing.

Transposable Chord Chart Fakebook

Scott
Scott