Here's an idea: after the usual spam checks, pass every incoming email automatically through Snopes, as a last resort to spam prevention.
Vista has surely spiced up things a bit, as far as user interfaces go, and Mac's new Leopard is really beautiful. But how about rethinking the whole desktop and the ways one can interact with it?
We all know the various software development cycles. Alpha used to be mostly for internal testing. Beta represented versions released to the wider public for the purpose of real world testing.
Google recently acquired the Sweden-based Gapminder, the "non-profit venture for development and provision of free software that visualise human development", makers of the amazing Trendalyzer®.
I recently came across Humanized, a company that tries to bring the command line to the common man, by exposing operating system or application operations as simple commands, that can be typed at any time.