One big suggestion is to have an easy link from the blog to the main site. I know it gets said many times on here, but it is a very big turnoff.

As far as the app goes, I really enjoy the design. I also really like the concept and hope it works successfully for me

Edit: You really need to be more detailed about how the friends process works. I assume it only works with Twitter at this point because the app wanted to access my account. However, there is nothing on the website (that I could find) about how this worked. I would highly recommend creating a less awkward friending mechanism. As of now, the community aspect is useless to me because I don't want to spam my email list with invites.