Okay, managed to get Skype working on OS2007HE on the old 770. The only two things you need to do is to install the OS2007 Skype from the official repository and then replace the skyhost executable in /usr/bin with the one from the OS2008 packages, since they are not bound to the device as the OS2007 ones.

Only runs as root though (for some reason skyhost refuses to start as user), if anyone can help with that

To run it as user, just make sure that skyhost's owner is user:users (if you already ran it as root, delete /tmp/skype_socket). The same applies to the /home/user/.Skype folder (which is created with owner root if you start skype with sudo).

Connects normally, chat and conversation working, sound quality is acceptable.

Start talking already!

P.S. Step by step explanation

1. Install Skype through Application Manager. (or from the debs here: http://catalogue.tableteer.nokia.com.../user/s/skype/. You will need skype-ui, some language and default theme)

2. On your PC download the last Skype armel deb from here: http://catalogue.tableteer.nokia.com.../user/s/skype/ and extract it with some decompressor (I used IZArc on windows, on linux you can use dpkg or mc or something else).

3. Find a way to copy the file skyhost (about 1.7mb, save somewhere the previous one if you want) to your maemo device in /usr/bin (i'm using ssh/sftp, someone may offer something else).

4. Run as root

Should be enough. Run from the menu. Someone may correct me if i forgot something.