What a brilliant idea for a blog, if only I had thought of it first! I'll be revisiting!
There's no reason why you shouldn't make your own. By all means promote microfiction! There are other microfiction blogs out there. Here's a favourite:http://www.littlearrowireland.blogspot.com/
I need to moderate comments to reduce spam, so they mightn't appear instantly.. thanks so much for leaving a message :)