Jquery scroll down effect for a newsfeed similar to Google's Realtime search feed or twitter news feed

I like the scrolling effect seen in Google's Realtime search and the Twitter newsfeed. I'm thinking jquery animation could be used...not really sure what开发者_StackOverflow中文版 the logic would be to create the push animation when a new result is available. Anyone know of any jquery snippets / demo's that duplicate this effect? Any plugins available anywhere? Or any ideas of how the animation would be reverse engineered?

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Found what I needed:

Jquery slidedown effect http://api.jquery.com/slideDown

and this stackoverflow question: How to make a real-time jquery effect?