Just to be clear that's a self hosted WordPress.org site.
but it gives me an error (no RSS feed or something) message
The blogger has an issue they need to address. It took ages for that site to load because there are some many posts with big images on the front page. When I finally got the RSS feed URL this was what displayed:
XML Parsing Error: no element found
Location: http://www.lastwordonnothing.com/feed/
Line Number 1, Column 1:
This can't be fixed by WordPress.com Staff so I hope you did not contact them. The blogger needs to fix his/her own WordPress.org install or post to http://wordpress.org/support/ for help.