I've added a question to http://wordpress.org/support/topic/67018?replies=8 regarding the plugin pagepost2 which is kind of related to this question.
I would like to have posts of X number of charachters automatically split into multiple pages. I see <!--nextpage--> can do this, but manually only.
Anyone thought of a hack to add <!--nextpage--> at every X number of charachters?
What I'd like is to break posts at every 10,000 charachters without having to do it manually.
BTW found a flaw in the current <!--nextpage--> system. When added it creates a page /post-name/1/ that is linked from pages /post-name/2/, /post-name/3/ etc... unfortunately /post-name/1/ is a duplicate of /post-name/ and this is not good for SEO reasons. Any idea how to change the link to /post-name/1/ to /post-name/ or maybe a rewrite rule (rewrite /post-name/1/ to /post-name/) to fix this?