Hi-Rez Studios has released a public test server for Tribes: Ascend to allow for the public to test new maps, and weapons. The current patch notes for the Public Test Server can be read here. The current weapon available for testing is the shocklance, there are 3 ctf maps, and 3 arena maps. The CTF maps are a new version of Bella Omega, Canyon Crusade Redux, and Blue Shift. The Arena maps are Whiteout, Fraytown, and Undercroft. Be sure to hop on and try the shocklance and the new maps. Post any feedback on the public test server forum.
You need to be rank 15 or higher to use the Public Test Server you can download the Public Test client here.