First off: You stole Tumblr's icons. That's a really, really shitty thing to do. They paid good money for those icons and you blatantly ripped them from the site.

Not just that. You copy your "translucent borders" from Facebook, your "close window" dialogue from the original lightbox and your feedback tab links to Getsatisfaction. The one original idea you had, putting notebook lines in the background, you couldn't even bother to sync up with the size of your font. (Aviary does this but they actually sync up the lines.)

Second off: How is this better than Tumblr? Do you know what Twitter is without ultrasimplicity? It's a downgraded version of a regular blog. That's why "Twitter+this" startups fail. Twitter is only good because it's so simple.

I use my blog as a diary. I write 20-30 posts a day about whatever comes to mind in the hopes that I can preserve it as a diary for half a century and then figure out a way to make use of it. Why would I pay $10 a month for something that gives me less than I've already got?

Third off: I like the header design but it's hard to navigate. I'm also a little offended that as your "famous diary person of choice" you picked Anne Frank, whose diary is most famous because the person that wrote it died. What's the implication? "You'll die so write stuff down?" For an online service, that's pretty obnoxious.

All that stuff aside, it looks nice, though I wonder just how much of this design you ripped off sources of which I'm not aware. (I could swear that font looks remarkably close to the "sparse black-on-white" that Posterous uses.)