Premiers Flood Relief Appeal - details on how to donate in person, on the net, over the phone and by mail.
Adopt-a-Flood Victims Family for school supplies - helping school children who have lost everything in the floods have all the necessary supplies they need to start school.
RSPCA Flood victims - help our furry and feathered friends through this crisis as well.
Lifeline's Queensland Flood Appeal
Donating blood - Red Cross Blood Service
Playgroup Children's Foundation Keep Kids Playing Flood Appeal - assist Playgroup families and Toy Libraries in flood-affected areas by replacing toys and equipment that have been damaged due to the rising waters.
A couple of others...
GIVIT - they have a virtual warehouse where you can list items that you no longer need. They work with charities and match what you have to donate with families/individuals who need that particular item locally to you.
Cooking meals (as well as donating things) for families in need
I will update this page as I come across more information. If you have a link to specific organisations please PM me the details.