"one more" ajax call for multiple node add forms on one page
I worked on similar case. I wanted to add few nodes at one time without reloading page. 

Instead I did multi value field in my content type (mysomething), but I needed to have more elements than one field. So I found field collection module, made collection and put it as multi value field of type collection. Now when I do node/add/mysomething I have collection and [Add more] button below.

Creating collection allows You to add all core field types, so in your case I would add text field working as title and body field to collection.

The other thing is, that if someone add 3 collection at once it will be consider as one mysomething node by D7 core - You should make some views to see whats inside. Another approach is to catch node creation action of type mysomething and try to split it into nodes by rules, but I didn't do that so I'm not sure if it is possible. And finally someone probably can write custom module with ajax form, where submit button will save node for each element...

I think it's nice trick with no coding (UI visual puzzle). I can write step by step config for You, if needed, but it's pretty easy.