6 letter password (Score 2, Interesting)

The worst password system I've seen is in the online banking system that BankOne uses (which also applies to the credit cards that they run). It won't allow you to use certain characters on the keyboard - it forces them to be 6 (!!!) alphanumeric characters.

I had an account with them too (long since canceled) and used the following password for it:

E6l7rs

Which, naturally, stands for "Exactly 6 le7ters".

Even with crappy restrictions, you can usually come up with something that's not going to be easily crackable.