Bang re-invents push technology on the web, tackling a key problem with push: bandwidth. I don't know enough about what's been tried with push, though Akamai-style power could be a substantial improvement over, say, Java applets or Shockwave programs. It'd be cooler if there was a feasable push technology already built in to everything so we hobbiests could use it, but this stuff often requires too much power for small-scale operations anyway.