Since the federal government began letting select frequent fliers with new high-tech passes speed through airport security checkpoints, one of the biggest complaints has been that the year-old program is too limited to be of much use.

Now, a privately run version coming online in Florida could spur efforts to broaden the program _ and boost media entrepreneur Steven Brill's vision of installing such a system across the nation at airports and other security-sensitive locations.

Beginning June 21, the Orlando airport will let travelers pay $80 a year for a card that guarantees an exclusive security line and the promise of no random secondary pat-down. To get this new ''Clear'' card, travelers would have to be vetted by the Department of Homeland Security and submit to fingerprint and iris scans.

Similar systems exist at some European airports, and in five U.S. airports as part of a test by the Transportation Security Administration.

But the TSA's ''Registered Traveler'' program, which is free for now while in its test phase, has been capped at 10,000 participants, and cards obtained at one airport don't work at others.

The company behind Clear is Verified Identity Pass Inc., which Brill founded in 2003 in hopes of creating a nationwide, voluntary system that would give pre-screened people a dedicated fast lane for entering secure areas _ not only at airports but also office buildings, power plants and stadiums.

Brill, the founder of Court TV and American Lawyer magazine, argues that while more rigorous security checks are needed in post-Sept. 11 America, it doesn't make sense for everyone to have to go through them.