Chelsea Clinton may be getting married this summer to beau Marc Mezvinsky on Martha's Vineyard . Involved in this small tidbit of information: Ted Danson , Touré, the Obama's summer vacay plans, and a "democratic powerbroker." Rumors about Chelsea's wedding to her longtime mans ("boyfriend") Mezvinsky are swirling again, now; it was last reported by the Boston Globe in May that the pair were to tie the knot this summer on Martha's Vineyard at Ted Danson's crib. A Clinton spokesman issued a denial, saying that "She's not getting married on the Vineyard or anywhere else this summer. It's absolutely not true." Yesterday came a report from former MTV VJ Touré, of all people, via New York Magazine, of all places (to find Touré, demonstrating his deep knowledge of both weddings and sources who are "well-connected residents of Martha's Vineyard"!) that the two are getting married in a different location on the Vin...