In order to maintain my monopoly over as many "jeffnords" as possible at major social networking sites, I've signed up for Flickr and Pinterest. I don't expect to use them very often, but they both allow embedding, so we'll see.
I've also highlighted in bold my primary social networking links (on the right-hand column) right now. Since my music has been on the backburner, I haven't been on Soundcloud or Bandcamp very often. But hopefully this coming summer will change some of that.
The Internet Archive
YouTube: ephemeral ideas