No one seems to have posted this to the list yet, so I thought I should:
"Low-Resource Routing Attacks Against Anonymous Systems", K. Bauer, D. McCoy, D. Grunwald, T. Kohno, D. Sicker Technical Report, University of Colorado
http://www.cs.colorado.edu/department/publications/reports/docs/CU-CS-1025-07.pdf
It was posted on Slashdot:
http://yro.slashdot.org/yro/07/02/25/1913219.shtml
http://blogs.law.harvard.edu/anonymous/2007/02/26/the-rumors-of-our-demise/
Here is an FAQ by one of the Tech Report's authors:
http://home.cs.colorado.edu/~bauerk/faq.html
-James