announced that the "first of many waves of classic content" have been released at DNDClassics.com, a joint venture with DriveThruRPG. Announced at GenCon last year, Wizards has been hard at work scanning all those vintage role playing tomes into convenient, space saving PDF files for preservation and resale.
A look at the top 5 sellers in the first few days of release is exactly what you'd expect. Old fogeys fond of plastic polyhedrals should brace themselves for a warm wave of nostalgia!
D&D Basic Set Rulebook (yep, the one from the 1981 red box)
T1-4 Temple of Elemental Evil
B2 The Keep on the Borderlands
G1-3 Against the Giants
D3 Vault of the Drow
All of these old fiends and more are available for about $5 to $10 at DND Classics.com