GW, here's one method of many, open up the mini to allow it to be accessed and controlled remotely, then download a VNC client like Chicken of the VNC on your other Mac:
http://www.versiontracker.com/dyn/moreinfo/macosx/14099
http://www.macminicolo.net/Mac_VNC_tutor.html
As long as the mini is on your network it should just show up under the CotVNC Login "server" column, even done wirelessly via Rendevous on your Macbook Pro, log in with the password you previously generated for it, then connect, it really can be this simple. It'll remember your settings and password for next time.
http://www.versiontracker.com/dyn/moreinfo/macosx/14099
http://www.macminicolo.net/Mac_VNC_tutor.html
As long as the mini is on your network it should just show up under the CotVNC Login "server" column, even done wirelessly via Rendevous on your Macbook Pro, log in with the password you previously generated for it, then connect, it really can be this simple. It'll remember your settings and password for next time.