First off, Congrats!!!
Some words of caution... if you want to use the educational assets for private school that cannot be done with a 529... also, some states allow tax free distributions only if the child goes to school in that state. If the kid goes to school out of state the distribution is taxable.
I'd suggest you consult a financial advisor... blind info on finance's could get you in trouble if the person doesn't know your personal situation.... I doubt it will sunset, however 529 plans are scheduled to sunset in regards to the taxfree distribution aspect of the plan. Laws can change... knowing those laws could change the reccomendations as well.
Not knowing your situation, if this is for college (not a private elementary, middle, or high school), if you live in the State of Ohio, and a state tax deduction is meaningful to you (when you break the math down, depending on your income and state tax bracket, it could be a good deal, or maybe not too good at all... in regards to limiting yourself to the state of Ohio sponsored plan), using one of the state sponsored plans would prob. be your best bet. Putnam and Vanguard (Vanguard was just added in 2004) are the two fund families in the College advantage program...