Though it's nice to know that "Barry's feeling Obamanic!", without knowing where he's feeling it, it's hard to do more than virtually care. Root activity updates in the real-world, with Zkout.
Out of SF, Zkout fuses Twitter's incessant check-ins with the pinpoint specificity of Gmaps, prompting users to input where they're doing what, and perhaps to back it up with pics and video -- reinforcing the quaint, pre-internet notion that things actually exist. Hit the "Explore" tab for a city map displaying avatars of all users in your area; another click and you'll see their status (a quick scan might reveal "barting in from berkeley", or "shopping with Angelo and his gf"), plus cleverly titled accompanying media ("crowded train", "Angelo buying maxi pads"). Next you can holler at users by writing Facebook-style on their walls, or opening up a chat window; you're also offered the option to limit access to friends ("Go Private"), since it might not be prudent to let strangers know you've "blown cash on shots, too drunk to not get in the back of the first van that skids to a halt".
Coming up next for Zkout: real-time iPhone auto-positioning, so the whole world can know that your "real world" involves "sipping bubbly at Opus One" from your couch in the Marina.