I'll agree and chime in with the previous wordpress ecommerce related comments, but I'll also add in that our Southern Fried DNN user group had a meeting last month in which we specifically talked about some of the differences between DNN and Wordpress and you might find some useful information and conversation on the topic there:

[url=http://www.southernfrieddnn.com/Blog/TabId/208/PostId/44/sofried-august-meeting-roundtable-discussion-why-dnn-vs-wordpress.aspx]http://www.southernfrieddnn.com/Blog/TabId/208/PostId/44/sofried-august-meeting-roundtable-discussion-why-dnn-vs-wordpress.aspx[/url]