Any online incremental search tools available?

[beanbag]

Hi all,

Perhaps somebody can help as I can't find what I'm looking for and I'm sure it's exists.

I need to find an example of an incremental search that works in the same way iTunes does.
For example; As you type, the results appear. Does this exist or is it too much of a data load for online usage?

[beanbag]

Sorry for the delay in replying, but thanks for the help. The first suggestion could be quite useful.

Thanks again chaps!

BB