Your next Delphi app will obviously be very cool and successful. Think big and start small. There are many sources of inspiration and places to learn about Delphi.
Beyond the Delphi home page (http://www.embarcadero.com/products/delphi) and Delphi rich online documentation (http://docwiki.embarcadero.com/RADStudio/en/), there is also a vibrant community of developers (http://community.embarcadero.com), where you can read news, blogs, articles, and learn about online webinars and live Delphi events organized in your neighborhood, and ask questions.
Delphi community site app competitions for the coolest app are regularly organized. Check out what other Delphi developers are building and you will be surprised about all the kinds of interesting apps being built with Delphi, such as the Skype Windows client. I'm looking forward to seeing your next great...