Hey guys so for my website I have posted around 21 backlinks to high pr sites.(pr 4 and up) It has been 2 weeks and they have not been indexed...why not? I have put backlinks on high pr social bookmarking sites like digg.com and into high pr web directories...why have none of these links been backlinked? Should I ping them? If so where,how,and how long after pinging will they be indexed?
Wait for a bit more because you can't predict when the Google crawlers will come and crawl them up, i think you should wait a bit more and you could also "Ping Them" but i don't think that it is going to make any difference.
Yes wait for some time, you have done proper off page seo activities then i will surely indexed in search results.
Ping them if it takes so long... Also, you can post the links in a forum (or a Social Media site) to decrease the indexing process. Just be sure NOT to ping it a lot of times!