WOOOOOOOT THATS MY BOY SPARKEY!!!!!!!!!! ROCKIN THAT BOOBIE HELM!!!!! you shoulda took a pic next to me we could of been a nice set of twins XD! Titan server FTMFW!!!!!! Fistsofhell *Best monk eva!* Sparkey *Best Paladin eva!*
You get this from the Egg Hunt event "First Three" section.
The Digging bonus as far as I can tell doesn't improve your digging skills, at least enough to put me up a level, although it was a little hard to tell as I was lagging when I tested it and the time taken to change zones was off.
What it does do is allow you to dig up different eggs pretty frequently (Bird, Soft-Boiled, Hard-Boiled and Coloured were the ones I got). Hard to tell if it impacts the normal digging results - I still got Rare/Very Rare items in West Altepa, but I don't know if it affected the rates. Hopefully you don't get eggs instead of normal items (doesn't exactly seem like a bonus).