Warner has announced a DVD to Blu-ray trade-in program called DVD2BLU that allows you to choose DVDs to trade in, you pay $8 or $10 a disc (plus $5 shipping if you order less than $25 worth), and you get Blu-Rays in return. (US only, allow 4-5 weeks to receive replacement.)
To make the trade, consumers must visit the Web site DVD2Blu.com, select their desired Blu-ray titles and mail in their standard DVD versions of the films. Warner promises to deliver the ordered Blu-ray titles within a short time frame.
For orders that are more than $25, Warner will grant free shipping. Be aware though that on some, its cheaper just to go buy the Blu-ray version.