Debbie Weil offers some basic corporate blog pointers, and it's a good list. Nothing really earth-shaking here, but you should check your corporate blog for these things.
I'm not completely behind all of them; I think photos are nice, but not really essential for most business blogs. I'm also not sure that "subscribe by email" is that important - but maybe those of you who offer this can share some experience.
But a good list, and one that's reminding me that we should replace that list of names over at the right with brief bios. (The shoemaker's children and all that, I know...)