Awhile back, someone on this forum was looking for photos of Southwest's new terminal at ISP. I found some at Aviation Capital Management. Long Island MacArthur AirportIslip, NY
Southwest Terminal ExtensionMay 2004 - Finishing touches
December 2003 - Millwork, interior installations
August 2003 - Laying of steel and concrete work for the extension of the existing terminal building and the construction of eight new gates.
May 2003 - Southwest Airlines Chairman, Herb Kelleher, with ACM CEO, Andrew Vasey, at the groundbreaking of the new Southwest terminal at Long Island MacArthur Airport.
Link to photos
The pictures are kind of small, but from what I can see it will be a vast improvement over the current facilities.