The newest Google Maps mashup gives us the answer to all our childhood dreams. No longer must you locate a suitable shovel and perform backbreaking work for hours on end. No, Dig to the Other Side (quite possibly from here) allows you to select a location on the map and start digging, plotting the ending location on the map, so you can see where you would come out if you chose to dig and dig and dig and, well, keep on digging.
Luckily I never completed my own hole, or I would have flooded the Pacific Northwest (heh, that's funny) with the Indian Ocean. Or so the application is telling me. And assuming that I could dig straight all the way through the planet, when even my two-foot deep hole was horribly crooked. In any case - where does your hole lead?