I’ve also wondered about this. I started another blog (http://recreatedinchrist.wordpress.com) beyond my primary blog, The Stumbling Block, for personal reasons. But I’ve come to realize, that much of what I say at my secondary blog (which isn’t as frequent) is often redundant with some of my discussion at my primary blog. My secondary blog gets almost no hits, though, while my primary one gets frequent hits. My goal with my secondary blog was to be less “academic,” intentionally, and more ‘user friendly’ for the lay person . . . but apparently (by way of hits) my secondary isn’t as appealing; so I think I’ve given up on that venture.

So maybe I’m not the one to give you any clear advice here; but maybe you should incorporate your other two blogs into your primary one . . . but then again, there really is no right or wrong on this one — blogging is clearly a personal preference, and you can do whatever you desire (sorry, probably not the best help here ;-).