Thanks to all who replied! We were able to get ahold of another male at what we believe to be around the same age (more or less). They did their little "acts of introduction" (i.e. - squealing, humping, sniffing, etc.) and now seem to do quite ok with one another. We'll be keeping an eye on them for the rest of the evening, and hopefully they will be alright when we go to work tomorrow. I will be posting pics of the cute guys and their new home tomorrow once we get their C&C cage set up (we have to wait for a sign shop to open to get the Coroplast).