Because it's being integrated into Google's SEO equation...and because there are lots of compelling social components (hangouts, etc.), I predict Google+ is here to stay. May not displace Facebook, but it's got legs IMHO.
Incase you haven't seen it, take a look at datawrangler by stanford. basically let's you do intelligent permutations to your data in spreadsheet format then export a python script that remembers the manipulation (should be a time saver, yeah?) http://vis.stanford.edu/wrangler/