Rick, here a perfect example of what you speek of. It is a website called RECOVER THE GOSPEL.COM It is full of what is called "Holy Hip Hop" and "Sermon Jams".
[URL=http://www.recoverthegospel.com/]]]http://www.recoverthegospel.com/[/URL]
John Piper is well represented, and is shown in the video section with a rapper in his church on the Lord's Day doing the the "song" "Unstoppable". It can be seen here: [URL=http://www.recoverthegospel.com/?page_id=39]]]http://www.recoverthegospel.com/?page_id=39[/URL]
I also think the website Illbehonest.com fits into this catigory.
It has taken me awhile to see how dangerous this stuff is.