Teams who lost 3 straight conference championships:

[sportndandy]

John Madden's Raiders: Superbowl champs in year 4
Steve Young 49ers: Superbowl champs in year 4
Brett Favre Packers: Superbowl champs in year 4
Danny White Cowboys: Cowboys suck.
Andy Reid Eagles: The suspense is killing me!

[IrateCitizen]

1. No way. Three best NFL teams this year all in AFC...

Those would be:
1. Pittsburgh Steelers
2. New England Patriots
3. Indianapolis Colts

The Eagles MIGHT have had a chance at any of these three with Terrell Owens. They aren't even a good bet to make the Super Bowl without him.

The NFC has slipped in recent years into a second-rate conference, much like the AFC was during the late 1980's and early 1990's.

[sportndandy]

2. Only one can play in the game.

I guess you don't remember the eighties and early ninties when the NFC had one good team every year, and the AFC had a few. Every year the AFC teams would knock each other off and then get blown out in the super bowl.