I spoke at the recent OSGi DevCon London conference (part of JAX-London 2010) as it extended late into the evening - Oracle's Mike Keith and I were competing with the bar in the 9-10pm slot as we talked about the Apache Aries and Eclipse Gemini open source projects. For those of you who chose the bar, or who couldn't make it to the gathering in West London, here are my slides on Apache Aries. They describe the primary goals and capabilities of Apache Aries, including how to get involved.
The 1-line summary is: Take a look at Aries if you want ready-to-use components that provide enterprise OSGi capability or if you want to join the development community to drive the technology forward.