well, ian, it seems you were partially right...the earth seems to be destroyed, but not by cylons (since the cylons came with them). and it appears we have to wait until august to find out what happens next.....and who the 12th cylon is.
or maybe the 12th cylon is god, who wanted humans and cylons to come to earth together, because both would be necessary to rebuild it? seems god, or some sort of superpower, is going to come into it in any event - unless there's another explanation for how starbuck's viper suddenly knew where to go.
much as i like dylan, i refuse to believe he's the final cylon, guiding the universe through his songs...maybe it's hendrix.