As the site grows, I think there will be a lot of Drupal development/theming how-tos which in the Drupal world may result in "try one of these # modules" as we see in the (currenly) #1 answer for How to implement two way node references?
I think it's great to have a nice & clean collected list of modules (if someone can collect them in a single answer) but maybe it'd be worth while to encourage contributors to answer 1 solution to each answer, in the hopes that we could get a voting system on debatable solutions?
Mark did this on https://drupal.meta.stackexchange.com/questions/7/what-questions-are-on-topic-and-what-questions-are-off-topic
Encouraging 1 solution per answer will (obviously) encourage people to offer the single best option rather then rattling a list of every module available and maybe adding to the confusion.