Express Action Sports

I’m creating a site which features NCAA themed desktop wallpapers. You can download a wallpaper with credits. Each wallpaper costs one credit, and a credit is equivalent to 10 cents. Some of the wallpapers have logos of NCAA teams on them, but they are all custom. I was curious if this is considered TM Infringing. I have found a list of reputable sites which also use TM’d logos in designs, and there are a ton more of these sites out there, but I just stopped looking after I found enough to prove my point:

http://www.nba-wallpaper.com/wp-content/uploads/2009/06/hedo_turkoglu_wallpaper.jpg
http://nbafan.deviantart.com/art/NBA-Team-Cleveland-Cavaliers-67642187
http://wallpapers.diq.ru/en/54__NBA_Chicago_Bulls_Logo.html
http://wallpaperstock.net/sao-paolo-football-wallpapers_w9582.html
http://sports.desktopnexus.com/wallpaper/167452/
http://www.desktopia.com/cgi-bin/ImageFolio42/imageFolio.cgi?action=view&link=Sports/Football&image=48958.jpg&img=&tt=
http://www.desktopwallpaperfree.com/cgi-bin/img?file=sports/0_b.jpg
http://www.free-wallpaper-download.com/sport/MLB/slides/Oakland-Athletics-Chavez.htm
http://topdesktopthemes.ezthemes.com/pcenhance/dt/preview.phtml?blank+18569
http://www.wallpapersphere.com/sports-wallpapers/basketball/lebron-james.html

Please let me hear your thoughts.

I’m not going to clog up my computer memory with this kind of garbage – but just mention that in order for you "customize" logos to sell them you must have "royalty" agreement with the NCAA. No matter how you change the artwork/lettering – its’ still requires a license to reproduce and sell. I’d hate to see you get shutdown after you’ve gone through setting up your Website and everything.