Forum poster Kida has posted links to a Toonzone thread, which apparently gives 'official' character bios and episode summaries for MewMew Power. I say 'official' as no source is given, so I'm treating this with a certain amount of suspicion - it's as likely to be fan speculation as genuine news. Here are the character bios, and the episode summaries are here.

UPDATE (20 October): Kida advised us the Toonzone articles were apparently sourced from 4Kids's AOL site (not their main website), and forum poster Zenith has kindly posted a few screengrabs to confirm - Pic 1, Pic 2. The screenshots seem to indicate there's an official forum on AOL for MMP, so if you're an AOL subscriber please drop by there & tell them what you think (politely!) - keyword 4kids and follow the links.