Michael Spencer on Joel Osteen:

Osteen probably doesn’t have the knowledge to be able to judge his own errors in the light of Biblical truth. Sad, but true. He simply has no idea that he has no idea. He thinks Jesus, the Holy Trinity and the Holy Scriptures are all means to the end of having a better paycheck. According to Osteen tonight, you can get the same truths from any psychologist or motivational speaker.

internetmonk.com » Blog Archive » Reactions to the “60 Minutes” Joel Osteen Piece

You really should read the whole piece.  I find myself saying amen at every point.