There have been blogs about how to get unblocked before, but this one is about unblock requests themselves. You know from other blogs what place you put them in. But where in the place do you put them?
If you are using your message wall, you might as well create a new thread, rather than just replying to the thread about being blocked (if there is one). This blog dosen't have a huge purpose, but it's just looking further in requesting to be unblocked.