The current valid url is almost unchanged:

http://mt.google.com/vt/x=%d&y=%d&z=%d

The issue now is that the zoom parameter is inverted.
Value 0 shows the entire earth and 17 shows the closest view.
So when maemo mapper try to get a url with z=6, it should be
z=11 (17-6). When mm say z=5, it should be z=12 (17-5), and so on.
I think the only way to get mm to work with this is to modify the source
code, but i couldn't compile mm yet.