I came upon this problem before, but only now it really renders awesome desktop manager useless.
I was searching how to connect to Wifi with awesome. Found Gigamo Wifi Widget. Cool, how do I eat it?
The awesome wiki entry on widgets does not really answer this question.
I know my question is very stupid and the answer is somewhere in the documentation but I have no idea how to read it. How and where do I add widgets I find on the Net to my awesome lua files?
EDIT:
when searching where is the rc.lua
file henfiber mentioned, I came upon Archlinux wiki on Awesome, which put most important things in one page.