Hi,
My long term plan is to build a new comment system that can be used across features and replace the existing one in the blog which is very limited. This is mentioned on the Roadmap.
Short term, I'm implementing support for using Disqus for blog comments for the coming release. It provides moderation, email notification and other benefits. I've actually got it implemented and you can see it now on demo.mojoportal.com, but there is some script error in IE 8 that prevents it from working. I'm trying to find out the cause, but it works correctly in Firefox and Chrome.
Best,
Joe