Funny you should ask... .
We just didn't get to an advance screening, so Grant got into the UK sneak preview and wrote pretty much all of what I'd say about it.
I'm sure there will be many more things I'll say about the movie later, but for now, I'll throw out the thought that someone on staff was a frustrated classics major: "Cloud Cuckoo Land" is actually a reference to Aristophanes' The Birds, and Vitrivius was a real guy (for whom Leonardo Da Vinci's famous "Vitruvian Man" was named, since the whole thing was based on something Vitruvius wrote).
Also, the Lego Movie Facebook page just wished Charlie Day (the voice actor for Benny, the 1980-something space guy) a happy birthday, and almost every comment for the post says, "SPACESHIP!" But I really hope they re-issue Benny, cracked-helmet-and-all, in the next wave of LEGO Movie merchandise. Speaking of which, I think it's amusing that Benny in the movie has a more visible mold line down the center of his hair than the real merchandise does.