Hippo Alert
This simple addon alerts you when someone from your realm obtains the Long-Forgotten Hippogryph.
If the mount is obtained by someone on your realm, a zone wide emote is displayed. This is easy to miss, so this addon will not only play a sound if it detects it, but will display a dialog box in the middle of your screen. You can now take your eye off your chat log, and have this addon handle it for you!
Happy searching :)