weblogs changes feed to url list

/* get a uniq list of urls from Weblogs that represent the last 5 minutes of RSS pings */
curl http://rpc.weblogs.com/shortChanges.xml | \
sed '/^$/d' | awk '{ split($0,a,"url="); print a[2]}' | \
awk '{print $1}' | awk -F\" '{print $2}' | \
sed '/\(http.*\)\{2\}/d' | sort | uniq > uniqweblogs_out.xml