We have cleaned up the maemomm API reference and put the result online. Here’s an example for the Hildon::TouchSelector widget. Pages such as that are linked often from the “Programming with maemomm” book.
Like the gtkmm API reference, the maemomm API reference is partly autogenerated from the C API reference, with some clever automatic changes, and some manual overrides, so it will improve as the hildon C API reference documentation improves.