I'm not sure if football talk 24/7 is the way to go since you would need to talk about other sports in the off-season, but I definitely won't bash the idea entirely. Football is the most popular sport and may have the most passionate fan base of any sport in the country. Even though I just mentioned about talking about other sports too (you can't ignore the NCAA tournament or the NBA Finals, for example), there are really lots of things about football to talk about year round:
January--Bowl games and BCS title game, recruiting (leading up to national signing day on the first Wednesday in February)
February--National Signing Day, the Super Bowl, off-season NFL trades and rumors and combine talks
March--More combine and draft talk and spring practice in college football
April--College spring games and NFL draft in full gear (no pun intended)
May and June--Perhaps the biggest lull of the year in football. Upcoming NFL schedules normally come out during this time and heats up a little in June as the June 30 trading/cut deadline nears
July--NFL training camps open in the latter half of the month
August--Preseason NFL and college practices begin
September-December--Need I say more?
If someone can pull this off, more power to them!