Facebook's top brass, CEO Mark Zuckerberg and COO Sheryl Sandberg, have scheduled rare appearances on network news tomorrow to announce a what is being reported as a "life-changing tool."

Zuckerberg will appear on Good Morning America while Sandberg will play pick up later that night on ABC's World News with Diane Sawyer.

Details on what exactly Facebook's new tool might entail are still scarce, but we're not flipping out just yet. The last time the company teased a big announcement, it turned out to be Skype integration. Remember that?

[via CNET]