this is the best thing that ever happened! cant believe i didnt know about it before....
its a program called ZBATTLE which connects all people around the world to one place who want to play Super Nintendo games together..... and with great performance using UDP.
You create a game room and type in what Game/Games u want to play and just wait for somebody to join you and Challenge you!
was playing NBA Jam - Mortal Kombat - Street Fighter - Mario World - Mario Kart and shit all night long with some dudes............ so awesome!!! Instantly reminded me why old school games are better than ANYTHING today....
please give it a try... always great with more players!!
http://www.zbattle.net/
(make sure to use ZNES emulator version 1.42 or 1.36.. only them work online)