We have found it necessary to expand on our policy on signatures. The following change has been added in order to clarify an issue.
8c. Links to other sites in your signature
Links to other sites, that conform to the family friendly environment we try to uphold here at AquariumAdvice.com, are allowed, whether aquarium related or not. No other form of typed advertisement for any site is allowed in your signature. You may, in addition to a link (or instead of) link with a sig pic, provided it conforms to the guidelines in 8a. Violation of this rule will result in the immediate removal of your signature.
Basically what this says you can advertise your site in your sig with a link and/or a picture, you may not use the signature space to advertise breaking news on your site, or advertise moderator positions or beg for members. A simple link and/or sig pic, and good advice while posting will give you much better results than trying to use that space as a billboard anyway