For some reason that escapes me, we Internet-driven humans seem to feel the need to standardize icons. On one hand, I can see the value because icons transcend language if they're done right, but on the other hand since 99% of the world has no idea what an RSS feed or a blog or a podcast is, it seems like a rather inward journey.
In any event, you're looking at a contender for an OPML icon. I gotta tell ya - I don't think ayone but Dave Winer and a couple of his friends are using OPML feeds at all. Do a check right now - do you know what an OPML feed is? I do, I really do, but I'll be damned if I can find a use for it.