See the guide in my signature if you need details.
I used http://forum.litecoin.net/index.php/topic,1430.0.html (linuxNoob's illustrated step-by-step) to get started with the CPU mining, which instructed me to be running the run_p2pool.exe Stratum/RPC thingy? so that's running while my CPU miner (ScryptMiner GUI) chugs away. So, i started up CGminer, and figured it'd just point it at the stratum proxy as well, but while it's showing me now around 130kH/s in my cgminer dosbox, i don't see that reflected in the run_p2pool.exe dosbox, or on the status webpage
You didn't quite answer my question: the guide you point to is for mining on a local p2pool node but the command line you have shown is for mining on a remote p2pool node (p2pool.org) so I can only guess what you are trying to do.
If you are mining on p2pool.org, your local p2pool node obviously doesn't see you mining and it's completely normal that it doesn't reflect any mining: you are not mining on it.
You may want to replace http://p2pool.org by http://localhost:9327 if your goal is to mine on the p2pool node you installed on the miner itself.