My online life has evolved quite a bit, but I started out on the interweb blogging- and writing-wise being primarily a techie type, writing about web design, JavaScript and stuff of that nature. I don't do that much any more for various reasons, and I don't follow those types of sites much any more either except for a handful. But I do get my information about what is supposed to be new, hot and awesome from the few of those techie-person blogs that I do follow. That's how I found out about things like del.icio.us, flickr, Twitter, Vox, Myspace (way back when), Facebook, Joost, and so on and on and on. Of those I only still regularly use the first two (where I secured the username maki, as I like to do on any new site if possible).
None of those cool hip techie type blogs has ever really talked much about StumbleUpon, and I don't know why. Because, StumbleUpon is awesome. It is the best way to surf the interweb waves, through thousands of sites that have been pre-selected for you (aka Stumbled Upon) by other people, and filtered according to your interests.