1) Slows down the process of submissions. 2) One way listings are far better than reciprocal ones when it comes to search engine benefits.
Come on smoky, you have so many resources at your finger tips.... try www.directorycritic.com or Vilesilencer.com list or hey i know try the next thread over http://forums.digitalpoint.com/forumdisplay.php?f=65 thx malcolm