Installing the ubuntu 11.10 packages works.I can't compile awn on ubuntu 12.10. And i can't install it with the software-center but the program is listed on it. It isn't like awn depends to 100 % on vala, so all non vala written parts of awn schould be runnable on ubuntu 12.10 too.
AWN is now available in the main WebUpd8 PPA for Ubuntu 12.10 so you can install it using the commands below:
It has been dropped from Quantal:
However - given the warning from Jeremy Bicha and the original OP - the advise is to switch to another dock such as Docky
You can install AWN on 12.10 without crawling around the net collecting dependencies by temporarily using the repositories from 12.04:
1) create the file /etc/apt/sources.list.d/precise.list with the following contents:
5) remove the file /etc/apt/sources.list.d/precise.list
(EDIT: simplified instructions)