Re: Other planetary unions other than the Federation
in the novels you currently have the typhon pact, made up of I belive Romulans, Gorn, Breen, Tholians and Tellerites
The TP members you didn't mention were the Tzenkethi and the Kinshaya.
"Pitching is simple -- cheese for the kitchen and a yakker for the kudo." - Dennis Eckersley