http://www.workingclasscardioworkout.com/- Matt Wiggins really knows his stuff when it comes to strength and conditioning especially for combat athletes, MMA competitors, grapplers and wrestlers. Read some of his articles and check out his products and you are sure to take your conditioning and your performance to a whole new level.
http://www.grapplersgym.com/ - Mike Fry will get you in condition to wrestle.
combatgrappler.com - Zach Even-Esh is another guy who can really teach you a lot about conditioning for any combat sport including wrestling.
http://www.themat.com/ - The site for USA Wrestling.
http://www.wrestlingsbest.com/ - Good technique videos.