PZ Myers has a blog called Pharyngula—perhaps you've heard of it?
He gave a talk on junk DNA at Skepticon IV in Sringfield, Missouri (USA) a few weeks ago. I disagree with a few thing he said,
1. Some intron sequences are essential for splicing whereas PZ implies that they are all junk.
2. Regulatory sequences make up less than 1% of your genome and not more than exons as PZ says [What's in Your Genome?].
3. Half or your genome is DEFECTIVE transposon, not active transposons. Active transposons are not junk. Defective transposons are a form of pseduogene and they are definitely junk. The distinction is important.
But the main point is that the IDiots predicted there wouldn't be any significant amount of junk in your genome and that prediction has been refuted.