(Some) Penises I Have Known
...is the name of a unique sculpture that was recently auctioned off on Ebay for $305 by Kate Kretz. She says: "I have had many offers over the years to buy this piece, and I have held on to it because it is a somewhat personal work. As I will be getting married in the near future, it is time to send it out into the universe..."
You can see the full Ebay page here (originally found via BoingBoing).
And if you want to immortalise your own pecker, take a look at the Mould A Willy.