I use Wordpress to post regular articles in a sub directory at
http://www.drugteststrips.com/resources/ which looks similar to the main site
http://www.drugteststrips.com/ (though not exactly similar, it has the same feel as that of my x-cart. I have separate databse for wordpress and x-cart.
The DrugTestStrips Articles section on the left hand side on all the pages on the main site shows the list of all the articles as and when they are published. Similarly I show related articles (from Wordpress) to the product page (in X-cart )
If this is something which you would like to have, you can do it by using BuzzBoost service from Feedburner (
http://feedburner.google.com).