I found a community called syn_promo where people post to promote syndicated feeds they've started or ones they just like. I have posted a couple of times there about interesting RSS feeds, but I didn't want to be redundant in posting them here as well. I would recommend checking it out, and if you are interested in what I find interesting, you can see the feeds I'm subscribed to here.

Note: This post is only intended for people with too much time on their hands. "Busy" people should refrain from reading, clicking, or subscribing to said feeds.