Portland TriMet just launched their new site using OpenTripPlanner: http://ride.trimet.org/ Looking forward to seeing this in other cities and on the iPhone!
Can you not just create a shortcut to launch google maps in the browser?
The mobile web version of Google Maps still doesn’t have retina graphics, so it looks very ugly on most iOS devices.
it's not the maps that are a problem, it's the transit directions, but besides that, maps in a web view are painfully slow at best.