Proof of concept box with 8mB RAM

[hackmiester (Hunter Fuller)]

Everyone will laugh at this, but I have an old box with a 25mHz  
processor or so. It has 8mB of memory. I want to install some type of  
UNIX clone on it, as a proof of concept. I don't care if it's linux,  
freebsd, or something else, but I need something that will run with  
enough speed to run an sshd and not much else. It will just be to  
prove that old hardware can still be used. Any suggestions?