ThoughtSponge

//warning, this is a less heart rending addition to [FishRat]'s Thought Bubbles, which I love//

Basically, the ThoughtSponge would be a colection of ThoughtBubbles, a real time, virtual, geographical, bulletin board. Allowing people to post either static, categorised comments about a geographical location (a la a Bubble), or to have threaded discussions off the back of it. Enough talk, some examples

1) Buy one get one free coffee today
2) I love this place, the smell of the croissants is my favourite thing
3) hmmn, does anyone else think the violin section are just not paying attention?
4) in the 1940's this place was a bank
People could also vote on whether they thought a particular bubble interesting and you could view these bubbles sorting either by date (for topical discussion) or by voting order (most popular bubbles first).

At the moment you'd have to use a PC or similar to view the posts (if you're wireless you can set your device to beep when it comes across thoughtsponge topics of interest to you), but in the future (hmm, a sniff of magic about the future methinks), you'd want to be able to interface with the thoughtsponge telepathically, e.g. when you're really bored at a gig/lecture/cinema/cafe/bar/gallery you could have off topic conversations in thoughtsponge without having to disturb other viewers (who'd obviously turn off their thoughtsponge access anyway).. "Come on now class, and no playing with the thoughtsponge in my lesson"