DNA Repositories?

Dixie_Flatline asks: "While I was riding into work today, an odd thought popped into my head. Do we have DNA repositories, a la Titan AE, or many other science fiction stories? Let's face it, we aren't being really nice to our environment, and we may be moving off this planet *some* day. Better to start a repository now while we still have things to make a repository of, right?" Interesting thought. What projects are under way to archive the DNA of animal species worldwide, especially those endanger of becoming extinct?