Though I heard about open social networks, I doesn't gave much importance to these sites . But now I learned some facts . So was looking how I can add a digg-it , del.icio.us button in blogger. Though there are many thought of adding these two. Only successful in adding one. Working on the del.icio.us for now .

First login to your blogger account goto Settings->Archiving and look whether enable post pages is set to yes. Else make it yes and save the settings.

Then goto Layout->Edit HTML