I clicked the links and looked at them and it was not obvious what I was supposed to do with them. I use Google Reader. I try to keep it empty. I do not read feeds and Less Wrong comments on similar schedules, and don't want to. So I don't want Less Wrong comments to appear in my Google Reader.
You use Google Reader as a feed aggregator. It's awesome, and you don't want to change the way you use it - I completely understand and agree.
You want a different feed aggregator for this specific task - you could get that job done through us writing you a feed aggregator as a new page on LW, or by using one of my links to make a new web page on a different site that aggregates the two feeds, or by using a standalone desktop feed aggregator.
There is a new discussion section on LessWrong.
According to the (updated) About page:
(There is a link at the top right, under the banner)