C.J. Mahaney of Sovereign Grace Ministries has written a blog post on how he approaches the issue of erroneous teaching in the church today. It would be prudent for each pastor to heed Mahaney's careful approach to protect the flock from all the errors that are being taught today. He especially mentions Rob Bell of NOOMA fame infamy. You can read about C.J.'s heart on this matter here.
C.J. makes special mention of Greg Gilbert's review of Rob Bell's NOOMA videos. If you are interested in the emergent perversion of the gospel, you will do well to read Gilbert's review, which comes in three parts.