HroomHroom announces heroism/bloodlust effects by making your character imitate a Tolkienian Ent and say "Hroom hroom! Time to get hasty!"
This works for: Bloodlust, Heroism, Time Warp, Ancient Hysteria.
Sayings can be customized in hroom.lua.
HroomHroom is based upon SaySapped by bitbyte, which is an awesome addon. You should download it now.