Some quick impressions of games played...
Guatemala Cafe: Not bad, but didn't impress me. Somehow reminded me of Santiago, which I also wasn't so fond of, but that may be superficial.
Notre Dame: Has that "great" feeling. It will take a few more plays to be sure, but midway through the first turn it's got that feeling. Interesting options, engaging. It's got a little bit of multi-player-solitaire quality, but if you (like me) don't think that's so bad, this is really worth a try.
Animalia: Oh what a shame this isn't generally available. The art is spectacular and the game is a really good filler.
Wikinger: Didn't do it for me. A lot of people seem to like it more than I do. A bit to calculating without enough fun.
Thurn & Taxis: For Power and Glory: Not so much an expansion as a different (but similar) game that can be played with many of the same components. If you like standard T&T, you'll probably like this, but it's different enough to feel like a distinct game, even if they have many similarities.
Caylus Magna Carta: All of the good parts of Caylus, without all of the length. This is great.
Portobello Market: It's short. It's not bad, but it's not especially interesting either.
Nomads of Arabia: I didn't find many interesting choices and it's a lot of dice rolling, and not in the good way.
Settlers of Catan Dice Game: Cute, good dice game, but if I want to play a Yahtzee-like game, I'll probably stick to To Court A King or Kniffel Duell (Cosmic Cows).
Race for the Galaxy: This is still outstanding. The proofs of the art for the production version are jaw-droppingly good.
FF auction prototype: I can't say much more than that I played a really good Friedemann Friese light auction prototype.