It's true, Kevin broke the rumor and I just heard it on WNBC News and here is the story on the Mets website:

The Padres apparently have fulfilled their quest for a Gold Glove-caliber center fielder with the reported acquisition of Mike Cameron from the Mets in exchange for first baseman-outfielder Xavier Nady.
Cameron, playing right field, had his 2005 season end at PETCO Park when he had a violent collision in right-center on Aug. 11 with center fielder Carlos Beltran. Cameron suffered multiple fractures of both cheekbones. The Padres, before signing off on the deal, were awaiting clearance from doctors on Cameron's eyesight.

Cameron, who will be 33 on Jan. 8, batted .273 with 12 homers and 39 RBIs in 308 at-bats in '05, after missing the opening month recovering from wrist surgery. He's a .249 career hitter with 173 homers and 625 RBIs, with a .340 on-base percentage and .442 slugging percentage.

His best season was 2001, when he batted .267 with 25 homers and 110 RBIs for the Mariners.

Critically to the Padres' plans, Cameron has few peers in center field, having won Gold Gloves in 2001 and 2003 with the Mariners. He is the whole package defensively, and the club feels an improved defensive outfield, anchored by Cameron, could save the pitching staff about a half-run a game.

Dave Roberts, who played center last season, is expected to be shifted to left field, with Ryan Klesko moving to first base.

In Nady, the Mets would add a versatile performer capable of handling first base and all three outfield positions. Nady, who turned 27 on Monday, batted .261 with 13 homers and 43 RBIs in 124 games in '05, with a .439 slugging average and .321 on-base percentage.

In 269 career games, Nady has batted .263 with 25 homers and 91 RBIs in 775 at-bats. He never found a regular job with the Padres, reduced to part-time duty by manager Bruce Bochy by his inability to consistently hit right-handed pitching.

Nady batted .223 against right-handers in '05, but 10 of his 13 homers came against righties. He batted .323 against lefties. His '05 highlights featured homers in four consecutive games from June 24-27, and a game-winning grand slam in Atlanta on Aug. 20.

I don't know how I feel about this, as I said Cameron really grew on me last season. If the Mets were going to get anyone from San Diego I was hoping it would be catcher Ramon Hernandez who is a free agent.
This swap is contingent on Cameron's eyesight being tested by it seems to be a 95% done deal.