http://www.math.uiuc.edu/K-theory/0404
Have not made an effort to give complete references.
http://www.math.uiuc.edu/K-theory/0559 might be of some interest.
arXiv: Experimental full text search
NCG (Algebra and noncommutative geometry)
Rordam et al: Intro to K-th for C-algebras. Wegge-Olsen: K-th and C-algebras. Both in K-th folder.
nLab page on K-theory of C*-algebras