A few years back, I started a group over on flickr called 'CH3NO2', devoted to NitroMethane fuel. While not exclusively for drag racing photos, it's turned that most of the photos are from drag racing events around the world.
It's still only a small group, but we have some talented photographers posting up some cool photos, both new and old. You can check out all the photos in the group pool here. If you're a flickr user, please join up and post your own nitro photos.