Based on Owen's suggestion I've made some changes to user permissions.

1. New Members- Under 5 posts. No custom title, or signature permissions.
2. Registered Members - 5 or more posts. Can create custom titles, and full signature permissions including one image preferably company logo.
Important: No advertising banners, affiliate banners, cat pictures, and so on. This is a business forum, not a gaming forum.

I think it's important to allow members to tell who they are, and what they do.
a. It helps new users or those just starting out know the industry and expertise of the person who is responding to their questions.
b. Helps users get to know each other should people want to network or do business with each other outside of the forum.

Of course the main concern is spam and overt self promotion so I will keep an eye out for abuse, but will handle any instances on a case by case basis as long as I can keep up with it.

I will add the rules concerning sigs and titles to the forum rules.

Let me know if you have any questions or further suggestions on this.