I still play Freelancer on line. There are about 150 servers to choose from. Some are something like the single player game. Then there are some that are so Modded that it almost does not look like the same game.
A few servers I can recommend.
1) The Void. A huge Mod was made for this server. Can be fun. Usually anywhere from 25 to 80 people on at any time.
2) Eagle Utopia. A sever that will drive you NUTS!!!!. The Pirates have been given Hawk light fighters with Lv 9 Champ Shields and Lv 9 & 10 guns
3) Freelancer Rollplay LV. All I can say is that if you thought that Nomads were nasty, on this server wait until you run into a souped up Nomad Gunboat