Cladhaire has released an addon that makes an awful cacophany when you mouse over an egg.
(It's -really- loud, people =P)
I helped him a bit and sent a snippet that does the same for the SYB achievement which he has integrated into the 0.4 version.
Basically it checks for a female, over 18, Unbunnied, [race that you have yet to bunny], and raises the same cacophany if your flowers are on cooldown.
Just running it myself got me my last couple of races (a gnome and a dwarf) by scrubbing the cursor over crowds in Dalaran.
You can get it at WoWI: http://www.wowinterface.com/downloads/fileinfo.php?id=13245 or at Curse: http://wow.curse.com/downloads/wow-addons/details/handyeggfinder.aspx
