Aglavalin is correct in that this will create quite a load for the server to deal with plus increase the page generation times. Some of the requests are doable and even one of them already exists (1.a. = currentthreadspal.php) and the last ones (2a -2b) would take more time and effort than I care to dispense towards them.
All of the ideas have one thing in common which I don't like. They all pull information from the w3t_Posts table as do a number of already existant boxes. It is these types of boxes that cause heavier loads, especially on large sites. I don't think anyone really wants to add another 5 to 20 seconds on to their generation times? (depending on database size, of course)
I'll keep these ideas in mind if I find myself looking for something else to do though.
