On November 15th, Spree posted a link here in UHall to the uoam.net website pages from February 6, 2008 that had been archived on the Wayback Machine website:
http://web.archive.org/web/20080206144330/www.uoam.net/uoam.html. You can download the installation file from this page.
I don't mean to offend anyone here by saying this (somehow I know I will though), but I would be a bit leery of downloading the file from anywhere else. Someone else posted in one of the many threads that have popped up about UOAM in the last few weeks that McAfee was reporting a virus in a purported UOAM installation file she tried to download from someone else's site. Just be cautious.
The FAQ page for UOAM has also been archived by the same organization and you can find a copy here:
http://web.archive.org/web/20080202042933/www.uoam.net/uoamfaq.html . The FAQ page covers a number of questions, including how to calibrate UOAM if you don't use UOAssist.
The Link Pane help page is archived here:
http://web.archive.org/web/20080130135528/www.uoam.net/uoamh5.html. It should answer your questions about how to set up your computer to act as a server for UOAM. If you do a search on something like Google, though, you should be able to find a site that offers UOAM hosting services. Some of the companies that host TeamSpeak or Ventrillo also host UOAM for a small monthly fee. UOAM may have some "security issues," so you may find that some of your guildmates are reluctant about linking up through it if you are going to host it or even if you find a commercial site to host it.