Mark Huffman ConsumerAffairs.Com released a list : Top 10 Scams of 2006.
1. Fake Lottery Scam
2. Phishing-Vishing Scams
3. Phony Job Scam
4. Negative Option Scams
5. Nigerian 419 Scams
6. Pump & Dump Scam
7. Bogus Fuel Saving Devices
8. Grandparents Scam
9. Oprah Ticket Scam
10. craigslist Scam

http://www.consumeraffairs.com/news04/2006/12/top_ten_scams.html

1. Negative Equity/Trade-In Overestimation
2. Packing (inflated monthly payments)
3. Rewritten Contracts/Backdating
4. "Gotta Put It All in One Document" Rule
5. The Deferred Down Payment Scam
6. Changes to the Advertised Price
7. Using Your Language Against You
8. The Whole Truth About Used Cars
9. So is it New or is it Used?
10. "Certified" Used Vehicles

http://www.ucan.org/gasoline_autos/automobiles/top_10_auto_scams

1. Auction Fraud
2. Phishing Scams
3. Nigerian 419 Letter
4. Postal Forwarding/Reshipping Scam
5. "Congratulations, You've Won an Xbox (IPod, plasma TV, etc.)"

http://www.pcworld.com/article/id,119941-page,1/article.html

 1.A Charmed Life Gone Awry
2.Total Immersion
3.Take It to the Bank
4.Checking Out the Caregiver
5.The Ship's in Port and Other Fairy Tales

http://money.aol.com/bankrate/general/canvas3/_a/top-scams-targeting-the-elderly/20060615164009990002

1. Ponzi schemes
2. Senior investment fraud
3. Promissory notes
4. Unscrupulous stockbrokers.
5. Affinity fraud.
6. Unlicensed individuals, such as independent insurance agents, selling securities
7. "Prime bank" schemes.
8. Internet fraud
9. Mutual fund business practices
10. Variable annuities.

http://www.bankrate.com/brm/news/investing/20020829a.asp

1) The Nigerian scam, also known as 419
2) Advanced fees paid for a guaranteed loan or credit card
3) Lottery scams
4) Phishing emails and phony web pages
5) Items for sale overpayment scam
6) Employment search overpayment scam
7) Disaster relief scams
8) Travel scams
9) ¡°Make Money Fast¡± chain emails
10) "Turn Your Computer Into a Money-Making Machine!"

http://netforbeginners.about.com/od/scamsandidentitytheft/ss/top10inetscams.htm

 1. Discount medical plans
2. "Nigerian" letter scams.
3. Foreign lotteries.
4. Work at Home.
5. "Phishing" or copycat e-mails scams.
6. Online auctions.
7. Cell phone pirating.
8. Classified ad scams.
9. Sweepstakes.
10. Grants.

http://www.ag.state.nd.us/TopTen.htm