Cheats and Walkthroughs
Here's a news flash that isn't really news at all: publishers handle the pricing for DLC releases. Call of Duty: Black Ops multiplayer lead Dan Bunting said as much about Treyarch's own downloadable map packs in a new interview with Gamasutra.
"You know, we're on the development side, so we don't really have much to do with the business aspect of it, but we just strive to give players the most value that we can possibly give," he said. No surprises there. Bunting's got a point too, with regards to value. Most of the people buying these map packs will put 10 or more hours in, between the multiplayer and zombie maps. Not bad for $15 / 1200 MS Points.
What you SHOULD be interested in is the three-page interview that goes with the above quote. The price vs. value talk is limited to that one reply, but there's a wealth of information for those who are curious about the studio's process when it comes to building content and understanding what it is that we players want.