What she wants is Tumblr. And, from a developer perspective, look how they are coping with downtime. (Horribly.)

I think Twitter already pissed off enough developers by publishing their own free Twitter client. A free, integrated photo service would not appease a lot of people. I can still remember when TapBots touted their upcoming, secret iPad app, which, as it turned out, was a paid Twitter app. Ouch.