Did you ever find out anything on this? I'm wondering the same thing.

 

Hit the Search key on the face of the phone. It's "Quick Search"

 

I can't figure that one out. The search button does seem to be the most thorough search, but it still doesn't seem to do everything that is advertised.

But did you know you can long press on the search button and use the excellent voice search? That command does seem to access pretty much everything. You can say "Navigate to..." and give it a full street address, or just say "Burger King" and it will do it with amazing accuracy. Also you can say, "Call John Smith" and it'll do it without any further button presses.

Well, this is in 2.1. Don't think it was so useful in 1.5.