Tweaking links on blog summary page?

I’m trying to create a blog summary home page. I’ve set my “front page displays” to a summary page appropriately. But my posts are mostly <1 paragraph news items.

The way the page generates now, the title of the post links back to the actual post page (the permalink page). The thing is there is nothing new on that page. What I really want is for the title of the post to link the article (off-site) that the news item is actually talking about.

Is there any way to do this? Is there a plug-in that can hack how this (and other summary items) are displayed?