Craig, congrats on finding a mill!
I bought a 3ph 1.5 hp (name plate says 4.5 amps) Bridgeport about 1 1/2 years ago and was in the same boat.
I bought one of these static phase converters (At that time, I think I paid about $69.00 w/ free shipping)
http://cgi.ebay.com/Phase-Converter-1-HP-to-3-HP-STATIC-NEW-mill-saw-drill_W0QQitemZ260371950444QQihZ016QQcategoryZ4195 2QQssPageNameZWDVWQQrdZ1QQcmdZViewItem .
I added a 15amp breaker (could have been smaller, but it is what I had on hand) in the box I added several years ago for my welder. I then ran about 80' of 10 gauge wire (could have went smaller, but I thought I might add another machine in that room someday and I already had a roll of 10 ga) up thru conduit, thru the ceiling, then back down into my work shop room where the mill is. I mounted the phase converter on the wall behind the mill and wired it up. It has been working great for 1.5 years.
