Douglas Starnes posted about one pretty interesting UX pattern that was a visual combination of search and autosuggest which he was building in Silverlight. Douglas also has a second post in which he demonstrates the jQuery version.
I have been working on a UX pattern that discovered a while back. I am not the first person to do this but I have never seen an implementation in Silverlight before so I decided to give it a try.
The idea is this: The user is presented with a set of images and a text box. Each image is tagged with a number of keywords. As the user types a search term, images whose tags are not related to the search terms are faded out. In this way it is a combination of search and autosuggest.