Loads of motorcycle forums hacked

It doesn't. Big Red S
What he said.

Well unless you use the same password for everything! then you could be in trouble

On a seriouse note can I ask you computer people how does this all affect things that you have logged onto with Facebook or google? Changyammi
If you're using the same email address and the same password on all websites and happen to be famous then hackers might try and log in with the same details on other websites, like LinkedIn, Facebook, etc. and defame you (like it happened with Zuckerberg recently). Otherwise I wouldn't worry.