LilJon.us :: A popular rapper, visit his official website here. TheMag.us :: "The Magazine" RemotelyHosted.us :: A site offering remotely hosted scripts, perhaps. Fosgate.us :: Rockford Fosgate (creators of my current subs). Audiobahn.us :: A popular car audio brand. FamousPlayers.us :: A large chain of theatres, visit their official website here.
I browsed through a list of the "100 Most Popular Celebrities," and here's a few domains after some extremely popular ones that are still unregistered. I'm sure they are worth quite a lot, and won't be available for long!
DylanEdrington.com (Top 20): Learn more about him here. AnnSheridan.com (Top 20): Learn more about her here. AdriannaKarembeu.com (Top 30): Learn more about her here. SophieSchutt.com (Top 50): Learn more about her here. AndreaSawatzki.com (Top 80): Learn more about her here. MaryAstor.com (Top 90): Learn more about her here.