Perhaps because of the meaning is not very clear his name (more or less: "touch someone with your finger to get his attention"), Poke is one of the least used features from those available on the Facebook...
What is Search as your type by Google
Google recently announced that he had made available "As Search Your Type", via official blog.
ws_ftp.ini is a configuration file for a popular FTP client that stores usernames, (weakly) encoded passwords, sites and directories that the user can store for later reference. These should not be on the web!