Nothing can happen if you simply clicked the link. You have to enter your password to be phished. If you did:
1. Act quickly before they do something illegal or against the rules on the site.
2. Change all accounts (email, myspace, bank, paypal, PbNation, etc) that use that password to a new and completely different password. Use different passwords for each account.
3. Verify that all those accounts still have your correct and current email address on file.
4. You are done. Take more care in the future and always check the url before you enter your password.
If another user has accessed your PbNation account already:
1. Act quickly before they do something illegal or against the rules on the site.
2. Reset your password by clicking here and entering your email address:
http://www.pbnation.com/login.php?do=lostpw
3. Change all accounts (email, myspace, bank, paypal, PbNation, etc) that use that password to a new and completely different password.
4. Verify your email is correct and current.
5. Look through your sent PM receipts. If you see any that you did not send, PM them and let them know to ignore the previous message. Warn them not to click any links.
6. Look through your recent posts. Delete or edit any you did not make.