[mattmiller]

It would be pretty easy to dump each post into its own txt file to work with this. You might have a problem importing comments, I am not sure if disqus has a way to import older comments. I would guess not.

[akkartik]

"I am not sure if disqus has a way to import older comments. I would guess not."

This was a long-standing request (http://disqus.disqus.com/how_do_i_import_comments) but it seems there is a solution for the past year (http://www.makeuseof.com/tag/give-your-wordpress-comments-a-...) Tell us if you try it out.