Finding users

I'm wondering if there is a way to find a gallery with the user name as a search criteria? I'm asking because someone asked a question thru an older blog and I need a way to contact them directly.
Thanks as always!
D

Answer: New search engine can now search for all sorts of things, including users, galleries, series, and individual cels. But hey, you already knew that. This is just to convince people that I do read these suggestions. =)