How can I find tutorials for building an application that gets updates from an online website?

I want to build an application that gets u开发者_如何学运维pdates from online websites like Twitter or Facebook. Currently, I haven't even got a clue on how to do this.

Also, in certain applications, like Doodle Jump, I have seen updates that pop up. Some other applications have a news section that gets updated often. How is it done? Any tutorial or working code will be very helpful.

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There is a good tutorial I used to do this with ASP.NET.

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I'm going to guess that you are interested in building an iPhone app. I don't know if you have any experience working with objective-c or the iPhone SDK, but here is a nice tutorial that touches on some of the concepts you will need.

http://icodeblog.com/2009/07/09/integrating-twitter-into-your-applications/