P.S. To further demonstrate my cluelessness...
;)
for $rcrd in collection( 'Squibble' )//record let $k := $rcrd/*[1] where node-name( $k ) = contentChannel return $rcrd
This might help you out:
for $rcrd in collection( 'Squibble' )//record where name( $rcrd/*[1] ) = "contentChannel" return $rcrd
You could also try
collection( 'Squibble' )//record[contentChannel]
Christian