Lots of people have reported that the classic D&D material is available again at dndclassics.com. I tried checking it out, but every time I try to load the page I get a server error. Once the traffic dies down and I have a more stable connection than my phone, I'll try again.
In the meantime, I think this is a great move by WotC. Can't wait to compare the new files to the old PDFs I have to see if the quality of the scans has improved.