Popular private bittorrent tracker BitSoup.org (BS) has opened registrations for new members.
Site Name: Bitsoup
Signup URL: http://www.bitsoup.org/signup.php
Description: BitSoup is a decent private tracker with more than 100000 users. Although not as fast as elite trackers such as ScT or RevTT, BitSoup features good pre times for most 0day content.