@Gargantua:
GREAT examples by the way, what inspiration!
Here are a couple of others. The idea of fitting ramming bows on battleships became quite fashionable after the Battle of Lissa, in which the ironclad Re d’Italia was rammed and sunk by an enemy ship. Naval architects and naval officers became mesmerized by the impressive image of the Re d’Italia rolling over and sinking…but ignored the fact that, prior to being rammed, it had been lying dead in the water from battle damage. Fast-forwarding a bit, an example of the kind of peacetime accident which finally convinced people that ram bows could be more dangerous to your friend and enemies is the Victoria-Camperdown collision of 1893, which is described in detail in the Wikipedia article on HMS Victoria (1887).
Of course, a ship doesn’t need a special ramming bow to ram another ship. A dedicated ram simply increases the amount of damage to the enemy and minimizes the damage to yours.
For a few civilian examples of ships plowing bow-first into other ships (collisions, not ramming attempts), see:
http://en.wikipedia.org/wiki/Empress_of_ireland
http://en.wikipedia.org/wiki/Halifax_Explosion
http://en.wikipedia.org/wiki/SS_Andrea_Doria
Note in the case of the Andrea Doria sinking that the vessel which struck it – MS Stockholm – was equiped with an icebreaking prow, and collided at a 90-degree angle, so the result was severe damage.