I have just implemented Disqus in my website http://www.csillamvilag.com and am generally quite happy with it.
Social integration is great as it allows people to comment on my website with their social profiles.
a. Which services?
However, too many options spoil the user experience. I want to give only Facebook, Yahoo and Google as login options to commenters (no Twitter or Disqus logins for us, thank you).
b. Default service/ service on "top" in popup
Additionally, I want to allow visitors to comment as Guests, which is the top (default) option in the "Comment as" popup.
However, I would like Facebook to be the top (default) option in the "Comment as" popup.
Please take this as a feature request.
All login options are required and cannot be re-ordered. That said, thanks for the feedback; we realize some of the login flows (and options themselves) are outdated and will be addressing that in the next iteration of Disqus. More on that here: http://blog.disqus.com/post/19693554817/disqus-labs
I know all options are required and can't be reordered. Hence the feature request :-)
The link you posted is interesting but at first glance it doesn't speak to the matter at hand.