Until LessWrong 2.0 comes out, this is how I've been staying in touch with the Rationalist Diaspora. It took about an hour to set up and I can now see almost everything in the one place.
I've been using an RSS reader (I use feedly) to collate RSS feeds from these lists,
Rationist Blogs,
https://wiki.lesswrong.com/wiki/List_of_Blogs
https://www.reddit.com/r/RationalistDiaspora/
Effective Altruist Blogs,
http://www.stafforini.com/blog/effective-altruism-blogs/
Rationalist Tumblers,
http://yxoque.tumblr.com/RationalistMasterlist
And using this twitter to RSS tool for these LessWrong Twitters,
http://lesswrong.com/lw/d92/less_wrong_on_twitter/
This system is unsatisfying in a number of ways the two most obvious to me being 1) I don't know of any way to integrate the Rationalists on Facebook into this system and 2) Upvotes from places that use them like LW or r/rational aren't displayed. Nevertheless it is still much simpler for me to be notified of new material. If anyone has suggestions on improvements or wants to share how they follow the Diaspora that'd be most welcome.
Trying to think of what's not on this list:
The EA forum sometimes has insightful posts, mostly EA news
Givewell and Open Philanthropy Project blogs
/r/slatestarcodex, /r/LessWrong, /r/HPMoR, /r/smartgiving, /r/effectivealtruism, /r/rational
Thing of Things (Ozy's blog)
Topher's blog URL is now http://topherhallquist.wordpress.com
http://thefutureprimaeval.net is a group blog by a few ex-LWers I believe
You could probably dig up more by looking through the blogrolls of the blogs you've already identified. For example, Scott
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
Notes for future OT posters:
1. Please add the 'open_thread' tag.
2. Check if there is an active Open Thread before posting a new one. (Immediately before; refresh the list-of-threads page before posting.)
3. Open Threads should be posted in Discussion, and not Main.
4. Open Threads should start on Monday, and end on Sunday.