Hey Lightroom Users: Raw or DNG?

Using Lightroom? I started playing with the 3.0 beta tonight - I'm still using 2.x day to day - and I noticed that in the 3.0 beta they've defaulted to converting to DNG upon import. You can change the default so the raw files are imported, but I found it interesting they've defaulted to DNG. I have virtually no experience with DNG - I always import raw, export to JPEG, then archive my catalog with the files staying in raw format. So I wanted to put this out to any Digital Home Thoughts readers who are using Lightroom. Do you use DNG? If so, why? What are the advantages over keeping your images in raw format?