What Do You Think Is Causing This Leak?

So as I am taking my engine apart so that I can clean and polish it and repaint it before going in my car, I figured I would put some new gaskets in as well where there are apparently leaks or where it makes sense (oil pan, transmission pan, etc.). I really don't want to have to tear the whole front of the motor apart because the water pump was already new, but there is an obvious leak around the underside of the front. Here are a few pictures. Would appreciate some thoughts on what it might be and what gaskets should be replaced. Thanks.

http://s1364.photobucket.com/user/W...3-414E-850F-E0BBDB88FAB4_zps3oilnat0.jpg.html

http://s1364.photobucket.com/user/W...A-4DB6-A8B4-CD990529E582_zpsnrkcqdkq.jpg.html

http://s1364.photobucket.com/user/W...C-41E1-B467-4BF6B0117746_zpsi0eht98a.jpg.html