Here is a tip for anyone like me that is running 64 bit Ubuntu on AMD processors and wanting to install Skype. This is what I ran into recently and I found a solution so I wanted to share. This is a one liner that will take care of it for you, or at least it did with me on 8.04 Hardy Heron.
sudo apt-get install ia32-libs lib32asound2 libasound2-plugins; wget -O skype-install.deb http://www.skype.com/go/getskype-linux-ubuntu; sudo dpkg -i --force-all skype-install.deb;
See? That’s all there is to it! This installs some supporting libraries as well as Skype itself. I broke this into multiple lines at the semicolons so it would display properly, but you can run it all as one big command or seperately. Enjoy!