Thanks for the responses! I've been registered for almost a year (which seems like it was just yesterday), and can definitely say great progress has been made at reducing monthly expenses and increasing our savings rate. We still have a LONG way to go before I'd consider myself mustachian, but I'm WAY better than last year.
I find the more time I spend on the MMM website, the less likely I am to go shopping/spending needlessly. That equals money saved. Mint says we've trimmed an average of $2,000/month from our spending since last year. That's mostly because we paid off the clown cars (improvement still possible there as they are clown cars), got smart with cell phones and insurance, stopped overspending on clothing, and cut travel expenses....Now to work on dining out, my true weakness on busy nights.