Would your job responsibilities change? Assuming they don't (or some are added)...
Go to HR. See if you can pull your time sheets for the last year. Find out how much OT you worked in the last year. Presumably, that's what it takes to get your job done. You should ask for a raise to cover your "lost" OT pay. Yes, OT isn't allowed now. That doesn't mean it won't be allowed in a month or three from now.
What is the policy when you work "extra" hours? Do you get comp time? Do you have to work a certain amount of time before you qualify for "comp". For example, let's say you work 10 hours every day for a week. Can you take a comp day for that, or do you only qualify for comp time if you work a 6th day (and 'x' amount of hours)?
Since 'exempt' employees don't punch a clock, it's easier to take off for Dr's appts, sick kids, kid activities, etc.
There are benefits to both sides.
However, as Allison pointed out, you might want to make sure you qualify legally for being 'exempt'. The general rule is if you are a manager or work on commission, you qualify. If you do become exempt, I'd track your hours. It comes in handy when it's time for a review and you say 'I worked 'x' amount of hours and didn't get comp time or OT, I'd like a raise. Somewhere I have a spreadsheet I built that kept track of work time, comp time, holiday, and vacation time. Came in VERY handy when it was time to renegotiate.