why has put that interesting posting on his blog

 Inside my head, I sometimes refer to Del.icio.us as the Google In Reverse.
 Google has amassed a solid mound of ranked and twined web sites. The
 standings shift about with caution, the behemoths are tough to dethrone.
 And if I ask for Ruby, the answers in place may hold through the end of
 the year.
 ...
 Del.icio.us is perfect! The activity bred by competitive linking would
 be enhanced by the sharing of richer media.
 ...
 Better client software is needed to make this happen.