Still nothing better than a plugin that also requires purchase of a $49 script and possibly nagging my web host to enable features I may not have by default?
As Graham Stoney recommended several posts earlier, I am going to post a feature request/suggestion on the G+ forums.
I was also poking around on the G+ API site. While I can sometimes tinker my way through PHP and CSS, I don't know the first thing about app development... but if I'm understanding the main points of the few pages I was reviewing, it seems like G+ might be getting closer to finally making this happen.
It's all under what they're calling their "History API." Right now, they say this is only available as a "preview" for developers to begin building and testing apps. The page was last updated on 6/27/2012.