This is why i'm a good beta tester, i can break things easily. This only took a few minutes to do.
I tried to import my tumblr blog, which unbeknown to me, is down for maintenance, yielded no imported posts. So i tried to delete the imported posts "because nothing imported" but the dialog never went away, so then i decided to merge the 0 posts in an attempt to get rid of the new blog (full of imported posts, which there were none) attached to my account.
Now it seems my account is broken. (at least the main dashboard).
UPDATE: the reason i kept getting 0 posts from the import was because I didn't follow the directions that Posterous told me to do, which was to make sure that if i had a custom domain name, to use that instead. For me, this was the case. at the time davidmachiavello.com pointed to dmachiavello.tumblr.com so i should have used the custom domain name, and not the tumblr address. Once i did this, Posterous had no problem importing my old blog.