I will have to try it with egg white John, I don't really like the taste of egg white (I know it well from egg white omelettes) but I'll give it a try. The less adorned way is very good too. I made the same drink last night with a blend of dark rums I made and it was great too. I guess you could do it with bourbon although lemon seems to suit bourbon better. Lime might work with any kind of bourbon or rye white dog though.
Gary