TaxProf has an extensive collection of links.  Here is the most recent set of coverage (and this SNL skit).  Earlier coverage:

• IRS Admits to Targeting Conservative Groups in 2012 Election (May 10, 2013)
• WaPo and WSJ Agree: IRS Targeting of Conservatives Is Appalling (May 11, 2013)
• Schmalbeck on the IRS ‘Targeting’ of Conservative Groups (May 12, 2013)
• The Deepening IRS Scandal (May 13, 2013)
• The IRS Scandal, Day 5 (May 14, 2013)
• Jon Stewart and Vic Fleischer on the IRS Scandal (May 14, 2013)
• Inspector General: Ineffective IRS Management Allowed Agents to Target Conservative Groups (May 14, 2013)
• The IRS Scandal, Day 6 (May 15, 2013)
• Ellen Aprill, The TIGTA Report on the IRS Scandal: Questions About the IRS and About the Report (May 15, 2013)
• Phillip Hackney, The TIGTA Report on the IRS Scandal: Be on the Lookout for False Partisan Witchunts (May 15, 2013)
• The IRS Scandal, Day 7 (May 16, 2013)
• The IRS Scandal, Day 8 (May 17, 2013)
• The IRS Scandal, Day 9 (May 18, 2013)