Richard of Philosophy, et cetera, has an interesting series of posts re-evaluating marriage and relationships. If you look at links within the posts and at trackbacks, you will find even more thought-provoking stuff. Discussions in the comments are also most enlightening (not to mention that the diplomatic tone of debate on a philosophy blog is refreshing in comparison to political blogs where everyone has a finger on the trigger at all times).
It starts with On Jealousy and continues with Open Relationships. Then, in Kids and Open Marriages, Richard links to Bitch, PhD adn her post When Pseudonymous Kid met the Connoisseur.
Links via Chris of Mixing Memory, from a post that includes several other interesting links, including some to papers on linguistic analyses of presidential and vice-presidenteal candidates in the 2000 and 2004 elections.
These posts have some relation to my early posts on marriage and relationships, especially this, this, this and this (or check out the whole category for more).