The demo for Dragon Age II will be out next week, and Bioware really wants you to give it a try. If the demo is downloaded one million times across the three platforms it will be released for (PC, PS3, Xbox 360) between Feburary 22 and March 1, the develop will add some bonus items in the shape of books to the finished game.
The books are called Lothering's Lament and The Far Cliffs of Kirkwall. The former gives a XP-bonus when read, while the latter is simply worth some good cash.
If you want to keep track of exactly how many copies of the demo that have been downloaded, Bioware has set up a useful site.