Joerg Jaspert just updated the Software behind Planet Debian to Planet Venus, away from PlanetPlanet. The major benefit right now is the threading, we are now using 15 threads to download the various feeds instead of just one.
The reason for that switch, beside a little more recent code, was the faster updates which was driven by a request we got recently. Language based Planet Debian, ie. a spanish, a german, one. This is now doable without trashing the machine it runs on and will be there soon.