How to pass users pw through email?

[John Lester]

You are klh over there right?

I'll have to go through this tomorrow as I'm a bit too tired to be working on it now

I mainly need this for the birthday emails since that is what has been reported by some disgruntled members.

Would it be as simple as replacing $username with whatever the email variable is?

So instead of saying hello John Lester blah blah blah it would say hello jlester@whatever.com

Then making a plugin (that's where I'll need the most help) that will set the user options without them having to login?