I am not sure how much they help in improving your rankings but they do help in building one way backlinks to your website and if you are lucky you could see some traffic coming as well. SticKer
You can also get a directory submission service to submit your site for you. Like the one in my signiture link. You will not get blacklisted for too many submissions as they take time to approve and then crawl from the search engines, so to be honest the more the better, and over months you will be racking up lots of backlinks.
If you are a business owner and seeking to make presence of your website on the World Wide Web then directory submissions is the most viable option. The basic aim of directory submission is to create one way links to a website. This in turn generates more traffic flow towards your website and improves the search engine rankings. This method is perhaps the best suitable and affordable option of search engine optimization. It offers huge opportunities to promote a business online. In fact, directory submissions are the most essential factor to consider while developing marketing strategies of your business.
Directory submissions is a great thing that can get good traffic for your site and more permanent backlinks.
Directory is the source of category like health - sports - arts - Internet . yes it is beneficial for all user to get back links and improve your ranking .........
Always look at the directories page rank before submitting. Try and get ones at pr5 or higher.. there are loads. Otherwise, it is beneficial to submit but very time consuming.
Directory submissions are the main job that all webmasters must do cuz they give ur site high backlink authority and increase your appearance in google.
I don't know if there's value doing directory submission but since it is part of link building and SEO, you might try as well. I have been doing directory submission for my other sites and so far its a good source of having backlinks. I recently received an e-mail from http://www.hobo-web.co.uk about Directory Mazimer you might want to check it out.
Hello, I have a list of 500 directories with high PR and fast acceptance. Many of the directories on my list have instant approval. Feel free to PM for the list. They help to build backlinks for your website.