I can understand a player wanting to be comfortable in stating who he is and what he is all about. Being gay is part of who a person is I guess, and they want the ability to freely express themselves without being targeted and attacked.
The only problem I would have with it is "coming out" during the playoffs, or before the superbowl if that was the case. Only because everyone knows that there would be a media firestorm, and it would be a great distraction to a team of 1 or more players started talking about their sexuality.
It's not the fact that they are gay, it is all in how they decide to inform others of the fact. We should all not even think twice about a persons sexuality, whatever, it is what it is. Unfortunatly we all know that the media would be all over it, asking questions, and being way too intrusive.
Wait until the team has taken care of business for the season. Don't give the media ammunition. That is all I ask.