I ignored a friend request and now need to accept the request, I have sent them one and they accepted but they are still not visible on my feeds and friend list, how do I find that ignored message and change to accept?

A block prevents specific people from viewing your profile. Any ties you currently have with the people you block will be broken (friendship connections, friend details, etc.). Your profile will not be visible to them and you will not appear in their search results or friend lists. Blocking is mutual, so they will also become invisible to you as well.

Keep in mind that blocking someone may not prevent all communications and interactions in third-party applications, and does not extend to elsewhere on the Internet.

Please note that removing a block will not restore a connection. If you block a friend and then remove that person from you Block List, you will need to send them a new friend request. http://www.facebook.com/help/?faq=12253