The influential blog GetClickz says UBL is "real value" that can generate additional traffic to web sites.
"In recent years, buying directories for SEO purposes has been downplayed by many experts. This is not, however, to say that you should never do it when the directories are niche directories.
Take business directories, for example. Those are specific niche directories that can not only help your SEO value, but can also help generate additional traffic to your site.
The great thing about the Universal Business Listing site is that it costs only $30 per year. That’s a real value when you can write your own business listing for the directory and add whatever description you want. For example, let’s say you want to get into a new business, then this is the place to promote it.
If you want to increase your search engine rankings, then getting listed in a top business directory like this is the way to go."
Read more at: http://www.getclickz.com/2010/06/17/business-directory-listing/