i'm pretty sure you can vote for ANY song that was released for that year. at least once they have had a song in the 100 that no one had heard of until triple j played it for novelty value. and if you can't find it on their list, theirs a 'write-in' sort of function. you can even vote for britney spears if she had a song in 2004. the guys on the afternoon show say that if the theme tune from a show called 'media watch' gets in the top 20, one of them will run naked at a big music festival...
one of my favourites for the year was dresden dolls- girl anachronism. dunno if it gets airplay in the US but triple j does. another that probably doesnt get much airtime in the US is cody chessnut. and yet both those acts are american!
edit: i ended up voting. hey, i could do with 90 cd's of the latest artists! this was my 'short list':
*i'm so post modern - bedroom philosopher, the
chicken payback - bees, the
*get your hands off my woman - ben folds
* favourite jeans - bertie blackman
chicken - binder & krieglstein
10am automatic - black keys, the
banquet - bloc party
*yo mama - butterfingers
city lights - casinos, the
galvanize - chemical brothers
get ready - concord dawn
*a town called sadness - dan kelly & the alpha males
* a to z - darren hanlon
*i'm going to execute your ex-boyfriend - david mccormack & the polaroids
godhopping - dogs die in hot cars
girl anachronism - dresden dolls, the
memory lane - elliott smith
mass destruction - faithless
beginning of the ened, the - gentle ben & his sensitive side
power is on, the - go! team, the
guns don't kill people, rappers do - goldie lookin chain
*radio stereo - good buddha
playing in the distance - grand national
lotion - greenskeepers
i'm on you - izabo
never far away - jack white
ballad of hank mccain, the - john zorn & mike patton
school spirit - kanye west
* adrenalin - koolism
sing song sung - la rocca
* tonights the night - little birdy
portland oregon - loretta lynn & jack white
* gonna try to be a girl - love outside andromeda
drum 'n boogaloo - mo'horizons
letter from belgium - mountain goats, the
too drunk to f**k - nouvelle vague
you lot - orbital
ghetto musick - outkast
hold me now - polyphonic spree
shake your blood - probot
amerika - rammstein
manilla {remix} - seelenluft
* f***kin awesome - spiderbait
fit but you know it - streets, the
whatever happened to corey haim? - thrills, the
make it rain - tom waits
staring at the sun - tv on the radio
* summer days - tzu
* no rider - urthboy
all you people - vanlustbader
c'mon c'mon - von bondies, the
troubled mind - wild billy childish & the buff medways
common people - william shatner
* dimension - wolfmother
misty rowe - young heart attack
* lachlan - your wedding night
ones with asterisks i know are aussie.
and my final ten were:
favourite jeans - bertie blackman
10am automatic - black keys, the
get ready - concord dawn
girl anachronism - dresden dolls, the
memory lane - elliott smith
mass destruction - faithless
radio stereo - good buddha
ballad of hank mccain, the - john zorn & mike patton
ghetto musick - outkast
common people - william shatner
yeah, yeah i know. william shatner

. but it's a cool song, honest!