The DC Circuit court recently vacated the FCC's order imposing sanctions on Comcast Corp. for its network management practices. It held that the Commission failed to tie its assertion of ancillary regulatory authority over Comcast's Internet service to any "statutorily mandated responsibility."
"In this case we must decide whether the Federal Communications Commission has authority to regulate an Internet service provider’s network management practices. ..."
Here is the opinion: http://pacer.cadc.uscourts.gov/common/opinions/201004/08-1291-1238302.pdf