The new Ubuntu has several niceties, one of them is the apt: link handler. You can put a link like <a href=”apt:nexuiz”> to create install links for software in the repos: Click here to install nexuiz
Cool! and Convenient! 🙂
Learnt from the excellent http://blog.thesilentnumber.me/2010/04/ubuntu-1004-post-install-guide-what-to.html guide