If you want to donate online, here are some websites that are taking donations to help the hurricane affected animals:
http://www.noahswish.org/ http://www.uan.org/news/082805.html http://www.americanhumane.org/site/PageServer http://www.petfinder.com/ http://www.nsalamerica.org/ar/index.html https://secure.hsus.org/01/disaster_relief_fund_2005?
Some of those sites are direct links to the donation page, some are just the homepages of the organizations.