so my friend got me backstage passes to stony larue (http://www.myspace.com/stoneylarueandthearsenals), and they want us to take some pictures of them in action. i've never shot concert photography before. i don't know the first thing about it. i usually shoot portraits and stuff like that. any tips, suggestions, guides, edu's? i have a d300, d80, 85 1.4, 24-70 2.8, sb-600 thanks!