Blog aggregators based on the planet software are a staple of open source projects these days. Nonetheless, there are little gotcha’s here and there.
Thom May and I have run the PlanetApache blog aggregator for Apache Software Foundation committers for some time now. It looks like that planet is finally going to move onto official ASF infrastructure where it belongs (in my opinion). If you want a preview, point your aggregator at planet.apache.org/committers. This planet is using Sam Ruby’s refactored planet code, which is known as Venus.
Over in Python land, there are two different and non-overlapping planets: http://planet.python.org/, and http://www.planetpython.org/, as a reader of both of these planets, I would love to see them consolidated so I could stop seeing the articles that are on both planets.
In any case, planets are a great way to get a sense of what is happening in the various communities. If your project doesn’t have one, you should think about starting one. If you have one, make sure it is working super smoothly.