It's fun seeing a post on a knife forum that I actually know something about.
I've made hundreds (and hundreds...) of end grain and face grain cutting boards. I think that for a daily-use board, wiping on mineral oil every couple weeks should be sufficient. The neat thing about mineral oil is it's impossible to screw up. Just slather it on until the wood stops soaking, then wipe off the excess with a dry paper towel.
As you all suggested, soap and a warm water rinse is what I recommend.
I put a beeswax/ mineral oil mixture on a few of my boards, and I honestly don't see the benefit of the beeswax. There's certainly no harm in it, but it's messy and I don't think it adds protection or water resistance beyond what the mineral oil itself provides.
I would STRONGLY discourage putting a cutting board in a 200 degree oven. A good, end-grain cutting board is comprised of hundreds of blocks of wood, held together by Titebond III glue (or other food-safe, waterproof glue). Titebond III glue will weaken and eventually fail if exposed to 200 degree temperatures for a prolonged period of time. As a corollary, the reason you never put a wood cutting board in the dishwasher isn't just because of water being forced into the wood grain; it's also because of the heat of the dishwasher weakening the glue joints.
I've never heard of Petroleum Jelly on a cutting board. My concern would be the extent to which that jelly would 'penetrate' the wood pores to provide lasting water-resistance.
Hope that helps!