For example, here is a review for the new Disney movie Tangled (which I haven't seen yet by the way) that does not reveal any spoilers, but still gives me a balanced opinion of what I can expect from this movie. Personally, just from watching the trailers, I don't hold out much hope for a story of Rapunzel retold in "dazzling, modern" CGI animation, but I'll at least give the film a chance after reading the review.
If you are like me, you appreciate fine animation, the kind that makes you see things in a new, different way, pulls you into the world of the story that it's telling without making you feel self-conscious, and gives you something memorable to take away from it. Here is a short video that illustrates what I'm talking about. It's called "Howdy Doody and His Magic Hat", and despite the title or the time period it came from (1953), it's a short that'll have you giddy and smiling from beginning to end.
I've also seen a couple "silent-squeal-inducing" teaser-trailers for some upcoming animated movies (namely "Cars 2" and a brand new "Winnie the Pooh" movie).
(Wait, Pooh's getting a new movie?)
(Yeah, I was pretty surprised too.)
I am not going to give you the links to these sneak-peeks; you're just going to have to find them for yourself at Cartoon Brew.com: All animation, All the time!