Firstly does this really help increase your site's PR?
If so(or even if not so) is anybody out there interested in exchanging Links. My site is up to PR 3 and I am not that sure about all those sites that claim that they help exchange links. So I decided to approach the DF Community for answers.
Server specs (Server OS / Apache / MySQL / PHP / DragonflyCMS):
Linux/2.0.54 (Unix)/5.0.51/5.2.6/DragonflyCMS 9.2.1