I'm looking to really tie several weblogs together to form a cohesive site, but I'm wondering how one would mix two blogs in one template (shared between the two, I guess). I'm not necessarily referring to different sections of the page coming from different weblogs, but rather mixing them together. A basic example would be how kottke.org mixes entries and blogroll links in the same column. I'm not looking to do quite that, but it's a close enough example that it illustrates my point.
Anyone know how this would be done? (PS: I don't want to just make it a lot of PHP include() statements, as that would severely hamper page load-time on a long page; I'm really looking to do this with MT.)