The tablet has Internet Tablet 2005 software edition OS, which is a linux based OS; we already have an Orbiter running under linux (debian), but I doubt what it will be easy make it run it on 770 tablet. I'll write it on our unsupported devices list and in the future we'll consider building an Orbiter for it.
However, if you are a C developer and you want to port Orbiter to run on your device, you should read this FAQ from Nokia about Internet Tablet 2005: newbielink:http://www.forum.nokia.com/info/sw.nokia.com/id/fe8245c6-33ce-4cc9-8dab-c83ff8c37a3f/Maemo_Developer_FAQs_v1.0_en.pdf.html [nonactive] . You need to download "maemo development platform" from nokia.
Internet Tablet 2005 software edition is based on components from Debian GNU/Linux operating system, which uses the Linux kernel 2.6.x.
The application framework is based on basic GNOME technologies such as the GNU Image Manipulation Program (GIMP) toolkit (GTK+) widgets.