There's the Gen Tag (https://pinboard.in/u:221B_Recs/t:genre%253Agen) on the 221b_Recs pinboard, which is the archive I maintain for 221b_recs. The archive is a couple of months behind the comm right now, because of holiday and commission commitments, but it's MUCH better tagged than the comm is, which is patchy sometimes, depending on how experienced and comfortable the reccer is with tagging.