From all available indicators, the 2nd printing of The Dungeon Alphabet has entered the distribution chain. It's been officially moved off the "Coming Soon" line-up on the Goodman Games site and into "Newest Releases" without the accompanying preorder mumbo-jumbo, and it's being hyped along with Free RPG Day.
I got my author's copies last week and the book looks good. Other than the corrections, the only change is that Peter Mullen's incredible end pieces are now in TSR module blue rather than black and white, allowing the discerning collector to easily identify it as a second printing (well that and the big SECOND PRINTING on the title page).
If you've yet to pick up a copy, start pestering your FLGS to place their order now or visit your usual online retailers. I'll have additional information about the book in the near future. I'm just waiting for one last OK.
UPDATE: If you happen to be in Finland for Ropecon, please stop by the Lamentations of the Flame Princess table for all your OSR gaming needs. Pick up a copy of the DA and whatever else strikes your fancy.