Google launched a Second Live clone/revival called Lively (it's released in Beta phase), the nice thing about it is that you can integrate it about everywhere and you don't need an incredible install and update procedure, it's all extremely light.
I wondered around in some worlds and at the moment the only thing I can say is that it takes a lot of time to load but once you're in it isn't that difficult and quite user friendly. I can imagine that you can easily use this for marketing purposes as an added possibility to communicate with your audience. The great thing about this (as you may see below if you installed the plugin) is that you can just copy your room and put it on your site.
Again a nice piece of technology and skill from the Google House but we'll see if it's one that will last or will just go the same way as it's predecessor.