Running is big business and there are loads of sites out there that are great resources for runners.
Adidas have launched their site adirun.co.nz that aims to provide runners with professional training and motivation help once you have bought some shoes from them.
A useful tool that some of the people in the office use is mapmyrun.com.
And now if you are a busy exec (or whatever) in a city in the US of A then you can hook up for a customised running tour cityrunningtours.com, americanrunningguides.com, pacificrunningguides.com of the town you are in.
Running buddies with local knowledge on tap where ever you are visiting.