I do have to admit, jpegs would be better for me, personally. That would allow Paizo to put them on the web at higher resolutions. A PDF won't allow you to print out larger scale maps that are: 1) easier to read, 2) at a quality that doesn't look like it's been torqued too much, 3) easily adaptable for home play.
I've tried blowing up other downloadable map images to a very large scale in Photoshop, and then printed them out on transparencies to actually lay down on top of my battlemat. It makes for a great visual if the download resolution is high enough. Sometimes having the battlegrid on the file is problematic, but then one can print them out in color on paper, and use them as highly effective "pre-made" Dundjinni-style battlemats.
Having all of the secret doors and "DM-stuff" marked on the map is VERY problematic to "cover up", and makes the visuals useless as player hand-outs. Downloading those images is simply superfluous. Player maps will actually get used. And if one does indeed need another copy of the map as a DM, simply buying another copy of the magazine provides a better quality print than downloading and printing out a file of the same image (most of the time).
One thing I do have to say is REALLY great is the images that aren't maps. Maps are great and all, but sometimes it's really great to have a different kind of visual. Showing a picture of a monster/NPC that the players don't recognize is VERY close to what it's really like--they dunno what it can/can't do! They have to look for visual clues! And that's really fun.
Thanks, Eric! Glad they got up there! Well done!
And, golly, how much lead time did Ben Huen need to paint that doubletruck spread of the waterfront for Mad God's Key? It's beautiful! Jason must have had that mod into you guys a LONG time ago...
Coreyartus