Plugin for jQuery AJAX "live" searching

I am using Ruby on Rails 3.0.9, jQuery 1.6.2 and jQuery UI. I follo开发者_如何学运维wed the Search, Sort, Paginate with AJAX RailsCast and at the end of that Ryan Bates say:

"in production mode you should improve the live search with some plugin"

What jQuery plugin do you advice to implement an AJAX live search?

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Choose any You want from this selection for example.

I personally have used this one without problem.