Paul Tracy sold his a few years back.
A quick search at work (i.e. most sites are blocked) found these famous NSX owners...
Aryton Senna,
Alex Zanardi,
Eddie Jordan,
Rick Mears,
Gordon Murray,
Keichi Tsuchiya,
Steve Amgwert,
Bobby Rahal,
Paul Tracy,
Jimmy Vasser,
Jenson Button...