Hi,
These are some sites I have used with my Nikon. They may be of interest to you.
I purchased my camera at Wolfe/ Ritz camera and they include weekly classes free of charge, and they have been a lot of fun and very helpful they have two different instructors, and usually a class of between 5 to 20 each week its been a fun experience for me to learn with the others in the class.

http://www.nikonusa.com/Learn-And-Explore/Photography-Techniques/index.page

  http://imaging.nikon.com/products/imaging/lineup/microsite/d3000/en/   

 http://www.kenrockwell.com/nikon/d3000/users-guide/index.htm            

Have fun, I would be curious to see what you think of your camera, I have a friend that is thinking of buying the same camera, have fun with it..      Nikon also offers some weekend workshops I am signing up for one in North Carolina in April and perhaps on later in Houston. Their schedule is included in the site I've included here. Good luck to you.   And I love my camera, I have the D5000 I use the kit lens a lot I have had great results with it , I also purchased a Tamron    http://www.tamron.com/lenses/prod/18270_vc.asp  lens and so far I am very happy with it as well. And don't forget to buy some filters for your lens. Both UV and a Polarizer.  They will make all the difference.
 
Lynell