Oh no, Facebook's hosting another event? But it's so soon after the last one , we've barely had time to recover from all that excitement. The invite to this new shindig is adorned with some pretty obvious visual hints at mail and messaging, which (along with a few well placed sources) has led TechCrunch to speculate that Zuckerberg and crew are about to unveil their Project Titan email client. Rumored to have been in the works since at least February, this "full-fledged" webmail service -- replete with @facebook.com personal addresses -- is reportedly referred to as a "Gmail killer" internally. We struggle to imagine anything dragging us away from Google's versatile mail offering, but competition's never a bad thing -- even if it comes from another company that has more information about us than it should.