YDN Tuesdays are a way to meet and hear technical presentations from Yahoo experts for free. They will be held on the first Tuesday of every month throughout 2009. For the full listing of upcoming YDN events, click here.

The Yahoo! Developer Network offers Web Services and APIs that make it easy for developers to build applications and mashups. Yahoo! APIs let developers tap into Yahoo!'s world-class data and infrastructure to help power their businesses and integrate data sources in new ways, making the web a more useful and interesting place for everyone.