This afternoon I upgraded from nopCommerce 1.4 to 1.5. It was a bit painful. I had to call GoDaddy support and James there was great. He ended up fixing the issue so I don't know what info to pass on to other nopCommerce users that host on GoDaddy.
I see there is a newsletter box on the left column. Will investigate that. The amount of improvements the nopCommerce guys made are suppose to be substantial. Many added features too. Here is a link to the nopCommerce
1.5 feature list.