dennis' little tumblr read at your own risk.

Marco.org: iBooks and private APIs

iBooks’ use of tons of private APIs is frustrating on a few levels, the biggest that it makes all third-party reading-related apps second-class citizens.

I won’t be able to offer many features that iBooks has (such as a true brightness control or integration with the system dictionary), but my…

Marco makes some good points here, but I think the APIs that iBooks is using might only be private until 4.0 comes out.  A lot of people have been asking for a system dictionary and access to the brightness controls.  I think Apple will do the right thing and make these available to everyone.