I've added Nonaka Ai (Kyouko) to my
characters/seiyuus page, with pics of the so-far six main characters and their seiyuus, and info about the seiyuus.
I think everyone is doing fairly well, with Chiwa (Homura) the most striking voice so far. I look forward to hearing Yuuki Aoi go further off the deep end as life gets more intense for Madoka. I thought her emoting in the last two episodes was good. Her voice often has some artificiality in it, but in a good emotional cause.
Actually, I should mention the good work of Katou Emiri, who is certainly helping make Kyuubei the perplexing figure s/he is.