It appears that we are nearing a tipping point for the mass adoption of prominent web 2.0 services, like digg and del.icio.us. Endorsement by mainstream media opens these services up to millions of people who otherwise would either not know about them, or not take them seriously. So these are not just links, these are literally endorsements – or recognition of additional value for mainstream media.
Read more of Alex Iskold’s thoughts on the mainstreaming of Web 2.0 from the Read/Write Web