since I'm playing with OLSR I quickly built a package for my 770. In order to use it you need to be root and you need some basic knowledge about olsrd. The general steps are: edit /etc/olsrd.conf to fit your network, bring up interface and assign an IP address, configure the wireless part (essid, ad-hoc mode, and channel number), and finally start olsrd.
The package is available in my Maemo2 repository and on my Nokia 770 page.
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