As Daniel Holbach is announcing in his blog, an all new Ubuntu Developer Week is coming up soon. It will be held from from Monday, 31st August 2009 to Friday, 4th September 2009.
Ubuntu Developer Week is a great way to get to know more of the inner workings of Ubuntu. Plus, it's always packed with incredible talks about various subjects: check out the timetable.
You may also want to take a look at the brochure if you want to know how or where to start developing for Ubuntu.
Subjects announced obviously follow the latest developments in the community, so we'll get to know about fun stuff like Quickly, Papercuts, Mago, as well as lots about Launchpad.