Update January 22: The second part of wave two is here, and they too are all Star Wars games: Star Wars: Empire at War Gold, Star Wars: Rogue Squadron 3D, and Star Wars Rebellion. We won't know for sure until the final part of wave two hits in a few days, but it looks like we might have to wait for wave three for LucasArts games that aren't Star Wars.
The second wave of LucasArts titles has been released on GOG.com. This time they're all Star Wars games: Star Wars: X-Wing vs. TIE Fighter, Star Wars: X-Wing Alliance, Star Wars: Galactic Battleground Saga, Star Wars: Dark Forces, Star Wars: Knights of the Old Republic II - The Sith Lords, and Star Wars: Battlefront II.
There is also a 20% off sale on Star Wars: Knights of the Old Republic, and the adventure games The Secret of Monkey Island: Special Edition and Indiana Jones and The Fate of Atlantis. If you aren't interested in any of the games from this batch, the good news is that this time we don't have to wait very long for more LucasArts games to be released. More LucasArts games are coming on Thursday.