Regus usually charges $15 per month($180/year) for the gold Businessworld membership, which gives you free walk-in access to business lounges, cafes, free refreshments, and free internet.
It also entitles you to a 10% discount on day offices, meeting rooms and videoconferencing.
If you have a American Express OPEN Platinum or TripIt Pro, you can get the membership for free just by registering. Regus has also been rumored to be giving it away to targeted frequent flyers on Delta and American, and also for Priority club platinums.
Here is a customer testimonial: