There's the posts I thought the data drops were before. They showed up on bungie.net as coming from the CAA in the months leading up to Reach and had background on Noble Team, Reach, and some other things. For now they're still here for characters and a letter and here for general facts (including the distinction of probably the driest bit of what is technically sci-fi I've ever read, talking about pirates no less), and there are other sections about weapons and enemies that reiterate a lot of earlier and later points. Dry or not, it would be a pity to lose them.