I usually refer Crunchbase and VentureHacks
Crunchbase:
http://www.crunchbase.com/financial-organizations
http://www.crunchbase.com/search?query=VC
Venturehacks:
http://venturehacks.com/search_results?search_term=vc&se...
http://venturehacks.com/search_results?search_term=seed
http://venturehacks.com/search_results?search_term=investor
But also browse Venturehacks by bungee jumping links from one profile to another and by tags. I filtered out VCs to approach for my next startup from Venturehacks. You would be better off when you go thru their track record and see what kind(field) of startups they fund. Quality of content assured(venturehacks is by invite) since you won't find your Uncle Harry down the street who funds another chip cookie maker :)
Although there isn't any contact details on venture hacks, You can easily contact them by their current work office.