If you haven't seen our own Mikikazu Komatsu's photo features from Wonder Festival 2011 Summer, start there for a broad sense of what's on offer. He did an especially great spotlight on the various Hatsune Mikus, and it turns out Moeyo did a couple similar digests of Puella Magi Madoka Magika.
First, from makers such as Good Smile Company and Banpresto:
And then from independent dealers:
There are quite a few more images besides the ones I posted as a preview here—including some Kyubey, so be sure to click through!