Bethesda have announced that they'll be having a sale on all the Fallout 2-expansions this week on Xbox Live Marketplace, cutting the price of the DLC packs in half. This, of course, has nothing to do with the fact that Fallout: New Vegas is released later this month...
Either way, it's a good deal. If you haven't played any of the expansions yet, we at Gamereactor recommend that you at least pick up Broken Steel so get the new ending and the 10 extra levels.