Jobwire, and they'd been working on it months before the stock market started getting nailed.
This isn't just a nice idea. Tracking hires can be a good way to figure out which companies are doing well. A prominent engineer going to a little-known startup, for example, can indicate promising stealth technology.
The site will have ten to twenty short posts per day, including a longer "Hire of the Day" that will include more context. RWW talks about it in more detail, here.