yup,

I would love to see my 770 running windowmaker, icewm or another "light" but standard user interface; not something tabbed like Hildon or maemo.

this said, the OEM software is nice and is doing what it was designed to do. So far I never hit a limitation in my regular usage (no use for youtube) and Mapquest/googlemaps are OK on my 770. there's a lot of nice to have (like a usb port on the Nec Mobilepro 900c I just sold) but hey, it can fit in my pocket, stream Internet radio, play resized TopGear videos (by the way, the Polar expedition Special look Amaizing on the 770 screen (see http://www.topgear.com/content/news/stories/2067/ ))