With 1.7.3 coming sometime this week (possibly Thursday) and the buckkit devs haven't even finished the 1.7 release, could this delay the 1.7 release for multiplayer? Aikar is going to have to update the custom pluggins too.
There is this thread by Aikar http://empireminecraft.com/threads/1-7-update-still-a-bit-away.32374/ Based on certain posts by EvilSeph (Bukkit); 1.7.3 will most likely resolve multiple problems they are having involved with updating.