9
Well you can't do this atm but I did stumble across this:
In the block above the one you want to add a link in the title add <a href="yourlink"> after the text or code.
Enter your title of the block you want to add the link in as usual. Then put in the block content </a>. Add your content then as usual and your title is linked.
Make sure the </a> is before any text or the whole thing will be linked.