Poof. Vanished. Gone. Many Facebook users are no longer seeing the real-time news "Ticker" on the right side of their home page, but apparently it should reappear soon. While nothing was posted to Facebook’s Known Issues Page, one Twitter user relayed that his friend who works at Facebook said Ticker "will be back online soon". There’s a chance the removal could be more permanent, though.
The Ticker is essentially Facebook’s firehose, showing abbreviated stories about nearly every action taken by your friends, no matter how insignificant. If Facebook did remove the Ticker, it could make it harder for third-party apps to grow, but give Facebook more prime real-estate above the fold to show ads.