If you think your passwords are safe, you should checkout this blog: "How I'd Hack Your Weak Passwords."
Hackers, and I’m not talking about the ethical kind, have developed a whole range of tools to get at your personal data. And the main impediment standing between your information remaining safe, or leaking out, is the password you choose. (Ironically, the best protection people have is usually the one they take least seriously.)
One of the simplest ways to gain access to your information is through the use of a Brute Force Attack. This is accomplished when a hacker uses a specially written piece of software to attempt to log into a site using your credentials. Insecure.org has a list of the Top 10 FREE Password Crackers right here.
1.Your partner, child, or pet’s name, possibly followed by a 0 or 1 (because they’re always making you use a number, aren’t they?)
2.The last 4 digits of your social security number.
3.123 or 1234 or 123456.
4.“password”
5.Your city, or college, football team name.
6.Date of birth – yours, your partner’s or your child’s.
7.“god”
8.“letmein”
9.“money”
10.“love”
Link:http://onemansblog.com/2007/03/26/how-id-hack-your-weak-passwords/