Radiohead @ Nissan Pavilion May 11

That's the nearest local show, according to the band's PR firm's press release:

FOR IMMEDIATE RELEASE

RADIOHEAD CONFIRMS MAY 2008 U.S. DATES & VENUES

RADIOHEAD has confirmed the dates and venues to be visited on the first segment of its upcoming North American tour. They are:

May 5 – Cruzan Amphitheatre – West Palm Beach, Florida
May 6 – Ford Amphitheatre – Tampa, Florida
May 8 – Lakewood Amphitheatre – Atlanta, Georgia
May 9 – Verizon Wireless Amphitheatre – Charlotte, North Carolina
May 11 – Nissan Pavilion at Stone Ridge – Bristow, Virginia
May 14 – Verizon Wireless Amphitheater – St Louis, Missouri
May 17 – Cynthia Woods Mitchell Pavilion – Houston, Texas
May 18 – Superpages.com Center – Dallas, Texas

Pre-sale for the above dates will begin February 14 via W.A.S.T.E. with general on-sales following on February 16.

The second half of the North American tour will follow the band's summer tour of the UK and Europe.