Password generator enhancements

Just something for the suggesion box- I like and use the password generator and often use passphrases i.e. 'memorable' passwords. I'd like to see some additional options addded to help stengthen them such as:

- mininum word character length
- add a number and/or symbol to the Nth word
- maybe something like, replace certain letters with numbers e.g o=0 a=4 etc.