The NFL schedule for the rest of 2012 is long over. The new schedule will come out for 2013 next month. The schedule will be similar to that of 2012.
some time after the draft
Sometime in April 2011
some time after the draft
not until mid April
The dates and times of the schedule should come out in a few months, but the home and away games have already been figured out.
It is possible to view the NFL playoff schedule on the NFL main website. Besides the schedule, one can see statistics for all the teams, wins, losses, injuries and future playoff schedules.
When the regular season schedule is announced
I think the Pittsburgh Steelers have the toughest schedule this year.
One can find the schedule for NFL games played on Fox by going to foxsports or to the tvguide website. Each of these sites provide a wealth of information about NFL scheduling.
Nfl.com
It's not out yet.