Someone discovered that is possible to make Skype run on N770 with Os2007 HE.
It works really great for me!
This is what I did to get it working with skype:
1) First I installed the latest version of os2007 hacker edition, version 4.2007.46-3
2) Install Skype-ui, Menu>Tools>App Manager>Browse Installable apps>skype-ui
3) Download the last Skype armel deb, version18.104.22.168.5 and extract the file named skypehost (In folder ...../usr/bin you find it).
4) copy skyhost into your mmc card (using the USB cable).
5) Install Xterm, to install XTerm on a Nokia 770 0S2007HE go to maemo-hackers and click on the .install link for "bora"
6) Install "becomeroot" package, download it from here
7) Copy skypehost from your mmc card to /usr/bin:
~ $ sudo gainroot
/home/user # cp /media/mmc1/skyhost /usr/bin
/home/user # chown user:users /usr/bin/skyhost
That's all! You can find more information on the original post