Mozilla Labs is a team of guys building the future of the web. They are doing a lot of amazing work (most of it only alpha or beta for time being) and open doors for radically new ways for our future interactions with the web. They have been working on Weave, Ubiquity or Prism. I really like those projects and want to use them in the future.
Here is a video to show how to make Firefox accessible for bats.
Ubiquity Tutorial: Turn a page upside-down from Aza Raskin on Vimeo.
Of course, it is useless for humans (except...Batman ;-) but it shows the power of this kind of technology.