That's what I am curious about to. From reading the blog, I csn't tell which one did he sell. He says it's the same buyer but was it for the new site?

It was confusing. But I think he sold the public api site. And now he wants to work on the tweet jobs site.

After he had the idea for tweet jobs, he said the original buyer submitted another offer on the original project (which it sounds like he had most abandoned).