There's a whole bunch of ways out there on the web of spreading the word about your site. Back in the old wild web 1.0 days the best know were the link exchanges and link dump sites - rightly treated with derision.
In the Web 2.0 era we've seen sites like Technorati, Slashdot, Del.icio.us and Digg grow up with huge audiences - but it's hard for a small blog to make an impact there and get noticed for more than a few seconds.
ClickPyramid seems to have combined the best of some of the original link exchanges and applied some of the logic that drives a lot of the paid-to-read / paid-to-click sites to help promote content sites in more than a flash-in-the-pan, drive-by approach... the more traffic you drive, the more people see your site but at the same time everyone gets a look-in to the random links. And the best thing about this set-up is that because a user has to spend at least 10 seconds on each site you know people are reading it, not just hitting 'next'.
Sites like del.iciou.us and StumbleUpon may well have the capacity to drive a lot more traffic but it's a lot more random as to what will and what won't get noticed - ClickPyramid (at the moment at least) seems small enough to have a really personal feel - but it'll be interesting to see if it does manage to drive any traffic over the coming days, weeks and months!