For those interested, a new bonus chapter for Exchange was written and is available here:
 
http://www.fimfiction.net/story/169217/17/exchange/extra-five-vignettes
 
Sorry for no pastebin version, but it was written with fimfic formatting / bb codes already inserted and would look crappy in this format. For those of you who have not checked out the Fimfic version of Exchange previously, Chapter 3 there is also brand new, and the story as a whole is edited / expanded to be way better than the version here in my opinion. (As is I Dream of Luna)
 
This is likely the last pone-related writing I'll be posting. It was fun, guys. Take care!