I've found a new online time-waster (as if I needed another one): StumbleUpon. Rather than spend lots of time describing, I'll just point to an excellent description at thingoid:
thingoid » Stumble your way around the web
Thanks to StumbleUpon, I have created my own South Park character, found new ways to insult people in Latin... and found some useful reference sites. Let's hear it for serendipity!