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!