Hi Dave,
I will log this in our project tracker as a feature request for an improvement to the blog feature in mojoPortal.
We currently have similar functionality in CMS pages where you can specify an override for the page title in Page Settings if you want something different than the page name/title. But we don't currently have the equivalent for blog posts so it will be something we need to implement for a future upgrade, possibly as soon as the next release of mojoPortal. It is a good suggestion and should not be difficult to implement.
Best,
Joe