Doubloon

[Sarah]

A Spanish gold coin, no longer issued, varying in value atdifferent times from over fifteen dollars to about five. See Doblonin Sup.

[Sarah]

The official currency of pirates. Almost always made of pure gold, but occasionally of silver as well. All have some form of the Jolly Roger struck on one side. The majority of pirate booty is gold doubloons.

In the United States, Sacajawea or Presidential dollar coins, especially new, shiny ones.

[Sarah]

£2 coin

[Sarah]

a nickname for the new year of 2011
a mix of double and une (French for one) (ish)
also, doubloons can be pirates treasure, perhaps signifying this new Golden Age of (online) Piracy?!
plus, it just rolls off the tongue much easier than Twenty