Delta has another free offer for free 250 miles; I did a search and I didn't see it posted yet.

"What do you do during a layover? Tell us and receive 250 bonus miles!
- Read a book
- Take a nap
- Visit the Crown Room
- Make phone calls
- Get a snack or meal
- Check your email

Go to www.delta.com/insideropinion right now and cast your vote. There you will see the real-time results from other SkyMiles Insider reciepients around the world."

Enjoy, free miles are always fun!