Installing Ubuntu on HTC EVO now “easier than making a cup of coffee”
When the HTC EVO 4G was first seen running Ubuntu last summer, getting the Linux distro on the phone required quite a bit of effort.
Today, more than half a year later, an EVO user by the name of Homefix has come up with the "first really working simple [way] to install Ubuntu on your phone." It may not be so easy that a caveman could do it, but as long as you're able to follow the instructions and feel comfortable with terminal commands, then Homefix's method is said to be "easier than making a cup of coffee."
The project has a beta label on it, so there are still some things to work on like getting sound to work and developing a way to get out of Ubuntu without turning off the EVO. But what you will get from following the instructions at the link below are Open Office, SSH, Hamachi Networking, Samba, Chess Engines, and some other things that I can only presume Ubuntu folks would appreciate.
Homefix says that this will just "sit on your SD card and ride side by side with your Android system," so you'll still be able to use your phone at the same time.
[xda-developers]