Andrew Dunstan has a post in his Andrew’s PostgreSQL blog reporting that PostgreSQL 9.2 will support JSON as a core type. This is yet another reason to favor JSON as a universal log reporting format as I discussed in my Writing Log Files In JSON post.
Of course, as a Lisper I’d still use S-expressions for any of my own projects due to their flexibility and self-transforming capabilities. Still, if you’re going to have non-Lispers using those logs, JSON makes a lot of sense. Certainly more than the common “printf” style logs, and especially more than an XML abomination.