Link buyers, beware! Google now is very close to providing a special form for paid link reports at some point in the future. It all began when Matt Cutts heard at SES London that people wanted a way to report paid links specifically.

Here is a tip on how to do this right now, directly taken from his blog:

• Sign in to Google’s webmaster console and use the authentic spam report form, then include the word “paidlink” (all one word) in the text area of the spam report. If you use the authenticated form, you’ll need to sign in with a Google Account, but your report will carry more weight.
• Use the authenticated spam report form and make sure to include the word “paidlink” (all in one word) in the text area of the spam report.

You can report sites that are both buying and selling links, preferably with a link to the page that demonstrate the case.

The Google team now is testing new techniques and need some real feedbacks from the community. A good move, Google.