Hasin Hayder has posted part two of his series on making a FriendFeed clone in PHP (here's part one).

Following the first installment in this series, here is the second part. In this part I will focus mainly on Bookmarking and News services supported by FriendFeed .

He points out some of the major bookmarking sites and the URLs for their interfaces for their users (like del.icio.us, furl, stumbleupon and news services like digg and reddit).