by removing both the username and password from the command line, p2pool looks for the .conf file for the user/password. This fixed my issue of my coin not running with Authorization issues.
I am able to run any single coin. So I started dogecoin and started mining again just fine.
Now I tried to start worldcoin. It seemed to get past the Authorization error, however, it gets stuck while starting up:
2014-02-26 09:31:48.533024 Testing bitcoind P2P connection to '127.0.0.1:11083'...
2014-02-26 09:31:53.533303 ...taking a while. Common reasons for this include all of bitcoind's connection slots being used...
...
So either the coin daemon can't accept any more connections or p2pool's connections are maxed out.
I am going to restart things and provide some parameters around max connections and have a go at it again.