$ ./ldr_subscriber.pl http://anond.hatelabo.jp/20101030232110 '.section ol > li > a' | head -8 already subscribed: http://alpha.mixi.co.jp/blog/ already subscribed: http://engineer.dena.jp/ already subscribed: http://labs.gree.jp/blog/ cannot discover feed on http://developer.cybozu.co.jp/ at ./ldr_subscriber.pl line 42. already subscribed: http://mtl.recruit.co.jp/ already subscribed: http://blog.spicebox.jp/labs/ already subscribed: http://labs.unoh.net/ success: http://tech.kayac.com/