I'd like to develop a theme that such that the front page looks like an antique newspaper, where posts are fit together with media widgets to look like a full page of newspaper text. Sort of like the Tanzaku theme, except that I don't like how the bottom looks ragged (uneven lengths). Any advice on developing a theme that will fairly uniformly fill a rectangle with posts and widgets, leaving all edges fairly straight across the page?
One possibility: I know that one can set post excerpt length for the front page in words, but I'm wondering if there's a way to set excerpt length to a certain pixel height, and then have the excerpt automatically cut off when that height is reached? If such a thing is possible (how?), it seems like it might answer my problem.
I know how to set div/container/sidebar sizes, also, just not how to get the text inside the container to fill them perfectly so there is no empty space.
I'd also appreciate if anyone can think of search terms that might help me find more information on this--I'm having trouble thinking of a short phrase that describes what I want to do, which makes the Googling nonproductive.