I don't have an emergency fund. My money is in investments, in my TFSA, RRSP, and taxable account. I can access the TFSA and taxable account money pretty easily, but I won't unless I'm buying an income-generating asset or am at the phase of my life when I draw down my accounts.
Instead, I have cheap, readily available credit. My home equity line of credit will give enough to cover over a year's expenses at 4%. If something happens that is so bad I can't fund it that way, I'll be dipping into my long term savings anyways. I've used this to cover renovations, months of low income and high expense, etc. and it's comforting to know that the money is always there if i need it. Meanwhile my investments bring in much more than 4% in an average year.
I have money because I made the little I had at the start work for me instead of sitting around. It's something I learned from the MMM blog.