Need ideas on locating an absentee owner

[Charlie MacPherson]

I've been watching a property that had real flip potential.  It sold 8 months ago and the buyer has done a little clean up of the overgrown yard, but work has appeared to be at a standstill for several months.

The address for the owner in public record is the property address, and given that it's uninhabitable, seems unlikely.

I need ideas for tracking this person down.  411.com, google, bing and white pages.com are no help.

Any suggestions would be appreciated!