I really enjoyed the PDF I have of the original, single volume Designers & Dragons. When I heard there was a 4 volume (possibly 1600 pages total) being worked on, I was thrilled.
I'm thrilled :)
For a measly buck you can grab volume 1 in PDF, mobi or epub right now.
For $15, you'll get all 4 volumes in electronic format. Volume 2 should be ready for download by Friday.
For $85 your get all 4 volumes in softcover and electronic format.
Need I say more?
If nothing else, spend a buck and grab Volume 1, the 70's and read about the birth of our hobby.