I've just flagged a post where someone is basically asking for people to model for his art project. This isn't specifically mentioned in the FAQ though to me that it is pretty clearly a "polling" type question and those are explicitly listed as things not to discuss.
Should the FAQ be updated with an explicit prohibition of solicitation (of models, photogs, etc.)? Maybe list some of the popular sites that already exist for this, e.g. Model Mayhem.