Having just utilized the services of the Santa Barbara Wildlife Care Network to find a home for three baby opossums that were left in my yard I thought I would give them a plug here. The woman I spoke to on the phone said that in a few weeks they will be inundated with birds and mammals and can use all the help they can get. If you want to get some volunteer experience working with animals this is a great opportunity. Their new location in the Fairview Center is convenient for campus too. You can complete an application on their website and they can use you even if you can only spare an hour or two a week.
FYI - If you find injured wildlife during the day, you can take it to the Wildlife Care Network located near the OSH store in the Fairview Center in Goleta. After hours, weekends, and holidays, you can take it to the C.A.R.E. Hospital downtown (Garden & Haley) which is conveniently open 24 hours.
(Apologies for cross posting this one, I try not to do this but in this case it seemed appropriate.)