Board Thread:Support Requests - Getting Technical/@comment-418817-20130118072117/@comment-4674838-20130118072916

If you have the new forums enabled on your wiki, you could go to Special:Forum on your wiki and create a board called "Admin Noticeboard" -- that will allow you to make new threads on that board and it would work the same way as message wall threads.

But otherwise no, threads only work with message wall or the new forums -- you can't turn other pages into threads or make them work like message wall.