id	summary	reporter	owner	description	type	status	priority	milestone	component	version	severity	resolution	keywords	cc
12199	Add actions before and after signup form on wp-signup.php	maxaud		"Make it so theme developers can easily edit the layout of the wp-signup.php page by adding actions after get_header() and before get_footer().

This will prevent users from editing core files.
This will have no effect on non-multisite setups.

example: 

do_action('before_signup'); 
do_action('after_signup'); "	enhancement	closed	normal	3.0	Themes		normal	fixed	multisite, do_action, themes