It's the tale of two attempts at "digital astroturf" or "online grassroots activism" or whatever you want to call it. Regardless of the label, there's an apparent media double standard at work: attempts to rig prominent online information sources for political gain is only worth reporting if the perpetrators are conservatives.
The blogosphere - though not the mainstream media - has been buzzing about a proposed campaign by a Daily Kos blogger to game Google's search algorithm to promote stories unfriendly to the Tea Party and the GOP.
Contrast the media's silence with the buzz over an alleged attempt by a conservative group on the aggregator Digg to "bury" stories on that site. That plot got coverage from ABC News, the Atlantic, the San Francisco Chronicle, even across the pond at the UK Guardian - not to mention from scores of liberal blogs.