Can Drupal built-in search or Apache Solr find comments on the site made with Disqus? I'm evaluating comment systems and although I see disqus used in many cases I'm not sure if it is the best choice for me as I am uncertain that my site's own search system could show comments in search results.

Can Drupal built-in search or Apache Solr find comments on the site made with Disqus ?

Research I have shown so far is that Disqus has Search Engine Optimisation (SEO) -- for external search engines e.g. Google:-


http://wordpress.org/plugins/disqus-comment-system/
http://www.quora.com/Do-search-engines-index-Disqus-content


But what about your own search system on your site, or using Solr for example. I'd prefer not to use Custom Google Search to search my site as I want control over how my results are shown.

So I'm looking for 2 answers for searching Disqus comments: 1) for the basic built-in Drupal search and 2) for SOLR.

Thank you.
Looks like it may be possible on the server side via the Disqus API PHP wrapper - I widened my answer outside of Drupal to get more input: https://webmasters.stackexchange.com/a/52159/3738

Though I still have concerns about not fully controlling the comment data and if the API changes. I'd have to see real benefits for our situation for Disqus to be able to outweigh these potential issues. Another issue is that of usability (UX/User Experience): having already logged in to the Drupal site, the user has to log in yet again to use disqus, unless the well supported Facebook login to the Drupal site can be "carried" into the Disqus login automatically. Though some user testing has revealed some would prefer the Disqus approach to be simpler.