Is there any potential to creating a google+ account specifically for my website? Maybe I'm lacking in imagination, but maybe someone else has ideas on how to expand to google+.
Google+ accounts give you the availability to verify authorship of content. Meaning you can put the rel=author and link to your Google+ account. The search results may show your image and other info about you when you show in results. G+ will also be used in my opinion, in the future as a serious ranking factor (If Google's plans workout) as it being a rival to Twitter and Facebook. I think they will look at the authority you carry as an author of content. How many people are in your circles, how many people follow you and other signals. They will use this to place content above other content in search depending on the authority of the person who created it. Just my thoughts. So yes you should sign-up and use it to the best of your ability.
Do you mean like a comments box that is connected to your accont like facebook offers? I don't think they do. You can set one up easy enough using disqus. Its not through goog plus but it works well for comments in my experience.
I'll check out disqus. I am trying to figure out the facebook one: http://forums.digitalpoint.com/showthread.php?t=2543354