I guess I'm in the minority on the Rockies but I think it's among the worst. Purple in NHL jersey's is great, too MUCH purple is a bad thing, it's a fairly bland jersey and the logo doesn't help matters.
Love the O6 look to some of them, not sure if anyone mentioned the Tigers but that one is another cool throwback look. Love the A's, great green and the flashes of yellow really make it work. Also a big fan of the Mariners and Astros jerseys. My least favorite (besides the one below) has to be the Giants, that badly needs some white piping to break up the black and orange.
As a Red Sox fan I'm offended by what they put together for them. It's gotta be the worst jersey in the bunch, between the massive logo, too much white and being totally off balance it's putrid.
All in all these are AWESOME, and many of them would be so cool to see on the ice. It'd never happen, the licensing alone would be impossible to overcome, but how cool would it be to see the different teams in a city have jersey swap nights, one game a year displaying a jersey from one of the other sports teams in the city?