ephemeral:

def.

Main Entry: 1 ephem·er·al
Pronunciation: i-'fem-r&l, -'fEm-; -'fe-m&-, -'fE-
Function: adjective
Etymology: Greek ephEmeros lasting a day, daily, from epi- + hEmera day
1 : lasting one day only
2 : lasting a very short time
synonym see TRANSIENT
- ephem·er·al·ly /-r&-lE/ adverb
Merriam-Webster Online Dictionary

Headline from pinknews.co.uk:

Pope calls gay rights an "ephemeral social trend"

Historical list (partial):

Pedro Aldomovar, filmmaker
Alexander the Great, conqueror 356-323 BCE
Hans Christian Andersen, writer
Marshall Applewhite, cult guru
Joan Armatrading, singer
Sir Robert Baden-Powell, founder of the Boy Scouts
Joan Baez, singer
Mr. Blackwell, asshole fashion critic
Dirk Bogarde, actor
William S. Burroughs, writer
Julius Caesar, caesar
Truman Capote, writer
Marilyn Chambers, actor
Traci Chapman, singer
Mary Cheney, daughter of Vice President Dick Cheney
Ellen DeGeneres, actor
Emily Dickinson, poet
Divine, actor
Matt Drudge, columnist
John du Pont, heir and ornithologist, alleged homosexual
Melissa Etheridge, singer
Rupert Everett, actor
Harvey Fierstein, actor
Malcolm Forbes, businessman [bisexual]
Pim Fortuyn, assassinated Dutch candidate
David Geffen, Geffen Records [bisexual?]
Jean Genet, felonious playwright
Boy George, singer
Sir John Gielgud, actor
Allen Ginsberg, poet
Hadrian, Roman Emperor
Rob Halford, singer, Judas Priest
Keith Haring, artist
Nina Hartley, actor [bisexual]
Todd Haynes, filmmaker
Anne Heche, actor [bisexual]
David Hockney, artist
J. Edgar Hoover, longtime head of the FBI.
Rock Hudson, actor
Billie Jean King, tennis player
k.d. lang, singer
Charles Laughton, actor
Ralph Lauren, fashion designer
Ursula LeGuin, author
Leonardo da Vinci, genius 1452-1519
Liberace, pianist
Greg Louganis, Olympic diver
Paul Lynde, Hollywood Square
Robert Mapplethorpe, photographer
W. Somerset Maugham, writer [bisexual]
Armistead Maupin, writer
Joseph McCarthy, Senator and persecutor
Sir Ian McKellen, actor
Freddie Mercury, singer, Queen.
George Michael, singer
Michaelangelo, Renaissance man 1475-1564
Harvey Milk, gay rights activist and martyr
Morrissey, singer
Martina Navratilova, tennis player
Sir Isaac Newton, scientist and celibate homo 1643 - 1727
Rimbaud, poet
Sappho, poet
Dick Sargent, second Darrin on Bewitched
Dan Savage, advice columnist
Matthew Shepard
Socrates, philosopher [bisexual] 470–399 BCE
Annie Sprinkle, sexpert
Gertrude Stein, author
Andrew Sullivan, conservative gay columnist, barebacker
Pëtr Ilich Tchaikovsky, composer 1840-1893
Scott Thompson, comic
Billy Tipton, jazz musician, lifelong male impersonator
Andrew Tobias, writer
Alice B. Toklas, cookbook author
Lily Tomlin, actor
Pete Townshend, The Who [bisexual]
Alan Turing, genius
Gus Van Sant, filmmaker
Versace, fashion designer
Gore Vidal, writer
Bruce Vilanch, joke writer
Andy Warhol, artist [bisexual]
John Waters, filmmaker
Oscar Wilde, writer
Tennessee Williams, playwright
(source - Famous Homosexuals)

That's quite an ephemeral list, don't you think?

just asking...