It's all in the title ... including the slightly off grammar. Anyway I've frequently found myself wondering where to find good conversation about specific topics; it usually seems to be the fastest way to get up to speed on a subject. Depending on the quality of the participants, it can be much better than any single reference source. I usually feel I understand a Wikipedia article much better after reading the talk page.

So it'd be great if I searched for "WRX car audio" and get directed to WRX modders talking about the best setups. Too bad Talk Digger seems to suck right now.