The adventure is an 80 page book, including front cover. Full color throughout, includes small shots of poster maps as encounter keys. Also includes a couple of non-tactical maps (like a map of the area, map of a walled village.)
The 3 double-sided poster maps cover dungeon and wilderness encounter areas.
The Quick-Start Rules booklet is 16 pages, including front cover. Ten pages are the pregens, which include level-up info for 2nd and 3rd levels. The other 5 pages are pretty much what we have seen from the DDXP demos.
You can find more general information about the adventure and how it was designed here.