Well guys, guess what I found. My old Vivitar Auto Thyristor 225! And even better, it still works. Now my question is, can I use it with my Nikon D5000? I know it works, but will it do anything "adverse" to the camera. I've read a couple of things about voltage feedback, or some such, and want to make sure before I go to town with it.
And just in case anyone is interested, I managed to find a manual for it. And many others. Check out this link.