As it stands right now (from worst to best):
4. ABC
3. NBC
2. FOX
1. CBS
State of ABC (2010)
The Good:
Most-Viewed BCS National Championship Game in four years; most-viewed NBA Finals in nine years; most-viewed NBA game in twelve years; most-viewed Men's World Cup match ever on a single network
The Bad:
Least-viewed Indianapolis 500 since at least 1986; loss of BCS bowls, British Open, most NASCAR races; no World Cup next year
State of NBC (2010)
The Good:
Sunday Night Football draws numbers on par with championship sporting events; the Olympic Games every two years; clinching game of Stanley Cup Final hits 36-year high in back-to-back years
The Bad:
Very thin line-up outside of the NFL and the Olympics
State of FOX (2010)
The Good:
Most-viewed non-Super Bowl TV program since '98 (Vikings/Saints), most-viewed NFL regular season and postseason in network history; most-viewed World Series since '04; consistent line-up of NFL, MLB, NASCAR
The Bad:
Daytona 500 hits 19-year low in ratings, 10-year low in viewership; 2009 MLB regular season averages record low 1.8 rating; loss of Bowl Championship Series
State of CBS (2010)
The Good:
Consistent line-up of NFL (through 2014), NCAA Tournament (through 2024) and (SEC football through 2024); most-viewed television program in U.S. history (Super Bowl XLIV); most-viewed final round of The Masters since 2001; most-viewed NCAA Tournament National Championship Game since 2001
The Bad:
No longer holds exclusive rights to the NCAA Tournament (shares w/ Turner Sports)
4. ABC
3. NBC
2. FOX
1. CBS
State of ABC (2010)
The Good:
Most-Viewed BCS National Championship Game in four years; most-viewed NBA Finals in nine years; most-viewed NBA game in twelve years; most-viewed Men's World Cup match ever on a single network
The Bad:
Least-viewed Indianapolis 500 since at least 1986; loss of BCS bowls, British Open, most NASCAR races; no World Cup next year
State of NBC (2010)
The Good:
Sunday Night Football draws numbers on par with championship sporting events; the Olympic Games every two years; clinching game of Stanley Cup Final hits 36-year high in back-to-back years
The Bad:
Very thin line-up outside of the NFL and the Olympics
State of FOX (2010)
The Good:
Most-viewed non-Super Bowl TV program since '98 (Vikings/Saints), most-viewed NFL regular season and postseason in network history; most-viewed World Series since '04; consistent line-up of NFL, MLB, NASCAR
The Bad:
Daytona 500 hits 19-year low in ratings, 10-year low in viewership; 2009 MLB regular season averages record low 1.8 rating; loss of Bowl Championship Series
State of CBS (2010)
The Good:
Consistent line-up of NFL (through 2014), NCAA Tournament (through 2024) and (SEC football through 2024); most-viewed television program in U.S. history (Super Bowl XLIV); most-viewed final round of The Masters since 2001; most-viewed NCAA Tournament National Championship Game since 2001
The Bad:
No longer holds exclusive rights to the NCAA Tournament (shares w/ Turner Sports)