Just an update for you guys: a CraftBukkit 1.7.2 development version has now been released! Please see the following link for more information:
forums.bukkit.org/threads/craftbukkit-fo...ow-available.200472/
I'm sure Tunes will get down to some environment testing as soon as he has the time, and I'm currently doing the same in my server(s). I'll keep you all informed if I come across anything strange.
Please note, the initial development build release
does not mean that the server will instantly be upgraded to 1.7.2. If there any plugins that no longer work, which seems highly likely, then all server owners that use said plugins will have to wait for them to be fixed (or pull them from a repository and re-compile them

).
Again, I will keep you all updated - keep an eye out on here.
UPDATE
Just booted up my server with all plugins enabled, and the only one that seemed to be an issue was mcMMO - that, unfortunately, might be a problem for the way that TWK and any other MMO-type survival servers work.