Hello, I was wondering if anyone would know how to update Nexiuz on Feisty Fawn. The software channel provides version 2.2.3 as the newest. Would there be anyway to update Nexiuz or do I have to completely re-install it?

well, what you would do is un-install nexuiz from your package manager, then head over to getdeb.net and download their nexuiz 2.3 package. Your settings should be saved.