Bukkit

Here is a list showing the progresses of the upcoming WorldEdit logging feature of 1.4:

Command	Development stage	Working	Estimated release	Priority
//set	Completed	Yes	1.4	H
//undo	Removed	No (will be restarted)	1.4.x	H
//redo	Removed	No (will be restarted)	1.4.x	H
//replace	Pending	Not yet	1.4	H
//overlay	Pending	Not yet	1.4 or later	N
//regen	Pending	Not yet	1.4	L
//cut	Pending	Not yet	1.4	H
//paste	Pending	Not yet	1.4	H
//walls	Pending	Not yet	1.4 or later	L
//outline	Pending	Not yet	1.4 or later	L
//smooth	Pending	Not yet	1.4 or later	L
//move	Pending	Not yet	1.4 or later	N
//stack	Pending	Not yet	1.4 or later	N
//hcyl	Pending	Not yet	1.4 or later	N
//cyl	Pending	Not yet	1.4 or later	N
//sphere	Pending	Not yet	1.4 or later	H
//hsphere	Pending	Not yet	1.4 or later	H
//pyramid	Pending	Not yet	1.4 or later	H
//hpyramid	Pending	Not yet	1.4 or later	H
/forestgen	Pending	Not yet	1.4 or later	L-N
/pumpkins	Pending	Not yet	1.4 or later	L-N
//fill	Pending	Not yet	1.4 or later	N
//fillr	Pending	Not yet	1.4 or later	N
//drain	Pending	Not yet	1.4 or later	L
/fixwater	Pending	Not yet	1.4 or later	L
/fixlava	Pending	Not yet	1.4 or later	L
/removeabove	Pending	Not yet	1.4 or later	L
/removebelow	Pending	Not yet	1.4 or later	L
/replacenear	Pending	Not yet	1.4 or later	L
/removenear	Pending	Not yet	1.4 or later	L
/snow	Pending	Not yet	1.4 or later	N
/thaw	Pending	Not yet	1.4 or later	L
Scripting commands	Not planned yet	No	/	/

This list is incomplete, some more commands will follow...