So the new Concise Oxford English dictionary has some words that might be of interest to WorldChangin' folk everywhere!

bioindicator
n. an organism used as an indicator of the quality of an ecosystem, especially with respect to pollution.

blogosphere
n. (the blogosphere) informal personal websites and weblogs collectively.

ecological footprint
n. the amount of land required to sustain a particular person or society.

flash mob
n. a public gathering of complete strangers, organized via the Internet or mobile phone, who perform a pointless act and then disperse again.
— derivatives
flash mobber n. flash mobbing n.

(more if you click permalink!)

bookcrossing
n. the practice of leaving a book in a public place to be picked up and read by others, who then do likewise.

desk jockey
n. N. Amer. informal, chiefly derogatory a person who works at a desk; an office worker.

mini-me
n. informal a person closely resembling a smaller or younger version of another.
— origin the name of a cloned character in the film Austin Powers: The Spy Who Shagged Me (1999).

weekend warrior
n. N. Amer. informal a person who participates in an activity only in their spare time.

Go here for a longer list., that includes another new meaning of the verb "sex".