Been watching the weekly documentary videos on their YouTube channel to learn more about them.
From Left to Right in the above picture:
Mizuno Mai - Long (past shoulder length) straight dark hair that covers her ears most of the time. Likes games and anime.
Sawaguchi Keiko - Mini hat, shoulder length hair, and she has an overlapping tooth on one side (left?)
Okumura Akina - Oldest one but doesn't look it. Slight resemblance to Fujimoto Miki (anyone else see it?). Talks to dogs.
Minato Akane - Handsome short haired member with vocal skills. Has a slight fanged tooth on one side also.
Maeda Yu - Side ponytail and her face looks tiny! Says "Yahoi" a lot and uses old samurai Japanese when introducing herself. No idea what "chankoropi" means but she says that a lot too.
Aoyama Reiko - Her hair looks like she's a confused member of Vanilla Beans.
Murakami Rumina - Other lead singer but with long black hair and softer features.
Sakurako - Ribbon, shortest member, and released gravure DVDs, so boobs.
Hayashi Yuzuka - lightest hair color, also boobs. Talks a lot during the MCs.
Matsumoto Runa - Sometimes I get her confused with Mai based on appearance but she shows off her ears. Likes saying "Wasshoi!" a lot. The silliest member.
Edited with smaller picture. Bigger version can be found on the Picroda.