There is a new discussion section on LessWrong.
According to the (updated) About page:
The Less Wrong discussion area is for topics not yet ready or not suitable for normal top level posts. To post a new discussion, select "Post to: Less Wrong Discussion" from the Create new article page. Comment on discussion posts as you would elsewhere on the site.
Votes on posts are worth ±10 points on the main site and ±1 point in the discussion area. [...] anyone can post to the discussion area.
(There is a link at the top right, under the banner)
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.