While surfing on the web, I hit up a "urban artist network" on www.urbanartistnetwork.net
The logo captured my attention, because it reminded me the NBA logo! But here it's a tagger
with a spray can in his hand.
But there are not just bombers in the B.R.I.D.G.E. Collective open association of artists , I've found for example Joslyn Virgin, a photograph.

To go back to this Urban Artist Network, their mission is really social and right:
"to make the arts accessible to people of all economic and educational backgrounds while promoting emerging urban artists". It's an art service organization.
I would also see them offering services for Marketing and Advertising campaigns. For example this bus might be designed for firemen!
The keepers of the FlameAlso all the website is well designed. I like the painting effect on the right side of the page while looking at the gallery.
I haven't been able to find a lot of stuffs about these people on the web, may be you will be luckier than me.
@V.