FranticFish - 8:45 pm on Aug 21, 2013 (gmt 0)
I'd echo Robert's point about unique listings. Here in the UK, the best (well, pretty much only) free general directory are super-hot on original content on their site. They've even written a wizard/widget that helps you write your listing and have disabled 'paste' into the text editor.
Most people simply paste a standard wording into all their online listings but I've seen rankings improvements from policing up old, duplicate listings for SME clients and re-writing so that each one is unique.
As a business owner a listing with a cookie cutter description will (IMO) help you less than one with a unique description. As directory owner, a site full of duplicate content could become a problem.