I've heard that DotNetNuke takes a bit of a hit for Search Engine Optimization. I'm not criticizing the platform, by the way; I love DNN. This is just what I've heard.

As I understand it, the impact is from repetitive content, table-based layouts, and lots of extra markup.

I've got a friend who would like to start an e-commerce site using DNN and some modules from Snowcovered. I was just wondering whether DNN would be a good platform to choose. The idea is attractive because of the ease with which a DNN commerce system can be deployed. Search-engine friendly URLs aren't the problem - the modules do that, it's whether DNN as a whole would be a good platform for this.

Thanks very much for any help or advice.