Selected answers from the Dumb SEO Questions G+ community.
Jason Duke: When you sign up to Pingler (or similar services) the only people who benefit are the owners of that site.
Peter Nikolow: It helps but there are complications.
1) Bot comes and fetch URL.
2) Index isn`t guaranteed.
3) If you "ping" from single IP many times search engines can stop indexing requests from that IP for while.
I made in past some tool called SEOPingler:
and observe all 1-3 issues during development.
Loren Baker: Just fetch new URLs in GWT and request indexing if they are not being indexed fast enough.