Build Your Own Submarine
Nerobro writes "There's a group of geeks out there who are bound and determined to build their own submarines. In fact, there's a large group who have been successful. The most interesting is Cartsen Standfuss's CSSX-1. There is a mailing list, owners group and sizeable archive of information at psubs.org."
Impressive as the linked submarine is, it's just like a military boat: a steel cylinder. As useful as such a thing may be as a weapons platform, I can't imagine anybody riding in the thing for pleasure.
My own fantasy of a personal submarine comes from the Nautilus in 20000 Leagues Under the Sea. The most important feature: a glassed in drawing room, furnished with overstuffed chairs and oriental rugs, from which I can survey the unfolding panorama of the sea as I smoke seaweed cigars and sup on lobster tails whilst I plot my revenge on humanity.
Post may contain irony: discontinue use if experiencing mood swings, nausea or elevated blood pressure.