Another decent private tracker just opened signup. Smoking In the rain (SITR) is a general 0day site with nearly 5000 users and over 6000 torrents.
Site Name: Smoking In The Rain
Signup URL: http://www.smokingintherain.us/signup.php
Notes: The site is currently on free leech till the end of this month. If you want to build the ratio now would be the best time as only upload will be counted. Signups will be open for 48 hours.