US VISA Renewal, Philippine Passport Holder currently Australian Provisional Resident?

My husband and I are planning to go on a vacation in the U.S. around late 2008, however my U.S. visa is going to expire in March 2008 and will husbad does not have a U.S. Visa. We both hold Philippine passports however my husband is a resident of Australia but I was only a temporary resident. . . Does anyone know how we can apply for a VISA and how it is? Thanks in advance