After writing about Posterous' "New Post" button yesterday, I dropped them a line saying the same thing. Today--less than 24 hours later--I received this email:

Hi Ebun,

Thanks for the feedback - I've shared it with our product team and agree that it makes sense.

Thanks for using Posterous!

Rich

Woohoo! I'm keeping my fingers crossed but here's to hoping they make the change. And props to them for the prompt, human response.