I am building a website and am trying to decide between writing my own commenting system and using Disqus.
One of the main deciding factors is that (obviously), I want comments left on my page to be show on SERPS. However, I remember reading somewhere that Disqus loads comments into a page using AJAX - and therefore the comments are "invisible" as far as Googlebot and other SE crawlers are concerned. Could someone confirm or refute this?
The other question I have is about whether (as a commenter), When I place a comment on another website using Disqus (including any links I may add to my comment), do the links in my comment count as a back link (in other words are they "dofollow" or "nofollow" links)?