Barkour

Link thanks to Diana Hsieh (Noodlefood), who isn't entirely sure she wants her dog to acquire those skills.

Acceleration

Does it seem to you that history has been moving faster lately?

If so, does this acceleration seem likely to continue?

What would a Historical Singularity look like? (Neither people nor computers get significantly smarter, it's just that significant events pile up closer together.)

Request for a graph program

This is for someone I know-- he's using excel spreadsheets to make charts of boxes connected by arrows, and the problem is that the process is relatively slow and clumsy. There are mind-mapping programs which are better in that respect, but a crucial feature is that he wants to get beyond tree structures-- any box might have more than one arrow leading into it as well as out of it.

Other than that, color options are good, as are tags and notes, and it would be good to have a graph that could automatically stretch itself if more boxes are crowded into a tight area. That last might be a little much to ask.