Here are you options:
QUEENSLAND FLOOD MEDIA FUNDRAISER
Works offered: media, fanvideos and graphics
Deadline: Bids Close 16th January, midnight EST time
QLD Flood Auction
Works offered: everything is welcome
Deadline: Bidding closes Wednesday 26th January 11:59pm (Australian Eastern Daylights Savings Time.)
Flood Relief: Fic Fundraiser Challenge
Works offered: fanfic
Deadline: Bids close on 11.59PM (AusEDST), Sunday 23rd January
If you can't donate, you can always offer your talents! Or do both. Whatever works.
I know many of my online friends live in Australia and/or have friends/family there. I hope that you and your loved ones are okay. My thoughts and prayers go out to all of you.