RewriteCond    Host:  (aemembers\.slightlywired\.com)
RewriteCond    URL    /(\w+?)/.*
RewriteHeader  Host:  (.*)    $2\.$1    [I]

RewriteCond	Host:	(\w+\.aemembers\.slightlywired\.com)
RewriteRule	/(\w+?)(/.*)	$3	[I,L]