you can do sudo gainroot and then apt-get install skype to get the deb
Then:
dpkg -x /var/cache/apt/archives/skype_1.7.62.48.2_armel.deb /
To extract it to the right places on the Internet Tablet
It seems to work.

(From http://www.eth0.it/2007/11/26/skype-...n-n800-os2008/)