Remus,
thank you - I've been blind finding the keyboard shortcut from that list.
Abot my second question, I'll post it in the Ruby Forum.
Just to explain what I mean with similar faces selection: in Wings 3D, the subdivision modeler, by selecting similiar faces, the program let me select all faces with the some shape and area (not really the some, but with a tolerance that tends to zero. That's why it's named select similar, instead identical - in some complex models it selects unexpected faces sometimes). The selection cares about the bounding geometry too.
Here a couple of screenshots to explain it better: the red highlighted faces are selected.
This works with the edges too. This saves a lot of time, when editing complex geometries: in sketchup I had to select manually the faces with ctrl + left-click.
wings3D-select-similar.jpg