I'll be blunt: Anything that promises me a "more enjoyable" inbox, and then advertises with cat pictures and what-do-we-do-for-lunch threads is missing the mark for me.

I don't want more fluff in my inbox. I especially don't want anything that helps people "email faster". It's not productive, it just makes more noise. E-mail is a medium for half-baked thoughts quickly dashed off to put them on somebody else's plate.

Find a way to reduce e-mail, to help people write more well thought out messages, and I'll be absolutely delighted.