Well, once again I am linking to a nice nugget of info from my buddy Jason over at Zune Thoughts. He has discovered that you can still search dynamically.

dynamicsearch

When you are in the device or collection tabs, all you have to do is start typing and it will filter down your search. It's not as dynamic as it used to be with the old software, but who needs dynamic? I'd rather the conventional search method anyhow with the search box.

There is one BIG GOTCHA to Jason's find though. It only works in the device or collection tabs. Why is that bad? Simple, the place I most want to search is the MARKETPLACE. This is too bad, maybe this was an oversight on the Zune Team's part.

Anyhow, that's still a cool tip from Jason for those 2 tabs. With a LARGE collection, the search is pretty helpful still.

Source: Zune Thoughts