The symfony advent calendar is a set of 24 tutorials, published day-by-day between December 1st and Christmas.
Every day, including week-ends, a new tutorial will be published on the symfony website. Each tutorial is meant to last less than one hour, and will be the occasion to see the ongoing development of a web 2.0 application, from A to Z. For Christmas time, the resulting application will be put online, and the source code made open source.
Sounds impossible? Check it by reading the first day.
And for you to talk about the advent calendar tutorials or the application itself, a new section of the forum, askeet, has just been launched.