I think that if you just "make" about 20 diggs spread in a 3 to 4 hour then rest can follow up automatically provided the article / link is good. It can get into self sustaining mode.
digg is congested. There are however digg like clones that can be used for page links. I run one digg like clone diggsamachar
targeted for Indian News. It get sort of permanent link if you gets about 2 diggs. Current PR
is 1 and Projected PR