Here are some great sites you should go to!
Black Cat's Moon-Full episodes, some nice MP3s and sounds, and great spoilers!
-PAC: Anime Central-Want to know more about Vash's guns? Want to see a great review? Want to see some great pics? Well come here!
-Filled with spoilers, biography on almost every character (I mean it!) and a list of who died...
-Up in Smoke, a site with great screen caps, and funny writings!
Trigun:WooHoo! Home to Lunatics has a little section on my favorite cat!
Official Trigun/Trigun Maximum Website!-It's official, but it's in Japanese. If you click on the 3rd link, you'll see a whole page with tons of pics of Kuroneko! Go now!