Thanks to the excellent work of Fcrochik we can have quite a nice "app" experience to browse streetview. In fact, he tweaked Macuco2 the way one can call it from dbus to open a certain url fullscreen, and decide in advance which user agent to declare. Install the latest Macuco2 (or update it); copy the attached .desktop file to /usr/share/applications/hildon/ and the .png file to /usr/share/pixmaps/ - and there you go