Great idea! Count me in and if anyone knows how to get rid of voles, I'm all ears.
Some links!
http://landscaping.about.com/cs/pests/a/vole_control.htm
http://www.ces.ncsu.edu/nreos/wild/wildlife/wdc/voles2.html
http://icwdm.org/handbook/rodents/Voles.asp
http://seattlepi.nwsource.com/nwgardens/306468_lovejoy10.html
i DON'T KNOW.
But short of gassing and poison . . . I wonder what ferrets would do! LOL.
Try putting a stick of Juicy Fruit gum, sans foil of course, in their holes. It's supposed to plug em up real good after they eat it.