I've been thinking about putting in a pond too but can't seem to find the time - so much to do on the farm!
Here's my latest idea - an experiment I intend to try this year: I'm going to plant the area of the pond with tiller radishes in late summer. About the time of the first frost I'm going to put pigs on the radish patch. My hope is that the radishes will open things up and inspire the pigs to dig extra deep. Once the rains come I'll see how the new pond fills.
Sounds like a fun project