What would it take to add lines and points to the supported types and make them clickable with perhaps a fudge factor radius?
Not really difficult I think, micro-framework for vector graphic painting is included to the library already. Only API need to be added. I have plans to include such functionality to the next version.
Depending on performance, this could be made into a very decent GIS viewer. You could even go so far as to do layer menus and draw ordering. Labeling might be really expensive though.