Ideally, yeah. She went back to wherever she came from, so I'm the only one in Sunnydale, but there's at least another one activated somewhere else just in case. Kind of defeats the purpose of having a 'chosen one' or something though. Oh well. That's what I get for technically dying.
In a nutshell, a big powerful demon was about to be put together (the only way to defeat him at first was to dismember him, and scatter his body parts around the world). Angel volunteered to go across the globe to hide it somewhere on the night of my birthday. Other things happened, and it didn't end all that well.
And yep. No soul. No conscience. The demon took over. There's no more humanity in him. That's how all our vampires are.