This is by Peter Dizikes of Salon and the article is very much worth a click through of Salon's free day pass. Each of the scandels below is discussed and where the current status stands.
1. Memogate: The Senate Computer Theft
2. Doctor Detroit: The DOJ's Bungled Terrorism Case
3. Dark Matter: The Energy Task Force
4. The Indian Gaming Scandal
5. Halliburton's No-Bid Bonanza
6. Halliburton: Pumping Up Prices
7. Halliburton's Vanishing Iraq Money
8. The Halliburton Bribe-apalooza
9. Halliburton: One Fine Company
10. Halliburton's Iran End Run
11. Money Order: Afghanistan's Missing $700 Million Turns Up in Iraq
12. Iraq: More Loose Change
13. The Pentagon-Israel Spy Case
14. Gone to Taiwan
15. Wiretapping the United Nations
16. The Boeing Boondoggle
17. The Medicare Bibe Scandal (Smith)
18. Tom DeLay's PAC Problems
19. Tom DeLay's FAA: Following Americans Anywhere
20. In the Rough: Tom DeLay's Golf Fundraiser
21. Busy, Busy, Busy in New Hampshire (phone jamming)
22. The Medicare Money Scandal
23. The Bogus Medicare "Video News Release"
24. Pundits on the Payroll: The Armstrong Williams Case
25. Ground Zero's Unsafe Air
26. John Ashcroft's Illegal Campaign Contributions
27. Intel Inside ... The White House
28. Duck! Antonin Scalia's Legal Conflicts
29. AWOL
30. Iraq: The Case for War
31. Niger Forgeries: Whodunit?
32. In Plame Sight
33. Abu Ghraib
34. Guantánamo Bay Torture?
http://www.salon.com/news/feature/2005/01/18/scandal/index.html