First off, at the risk of sounding like a hypocrite, I'd like to thank CL for introducing Corona Viewer. When it was first announced on the blog page, I gave it a less than positive welcome but after trying it out, in particular while working on a camera dependent module I'm trying to piece together, I came to realize how useful it can be. So I take back what I said on the blog and apologize for my earlier criticism.
Now regarding the Dropbox synch... It is working like a charm and I did discover an amazing use case. I happened to have a text editor on my iPad that can link to Dropbox. I can now take my Corona Development on the road and do a bit here and a bit there whenever I have some time on my iPad. Edit the main.lua located in Dropbox on your iPad and Corona Viewer picks it up right away and you get to see the results of the changes you just made right away. Its like magic!
The era of PC-less, Mac-less Corona development has arrived. So please, even if you implement IP connections for Corona Viewer, please don't ditch Dropbox support. It has this (at least for me) magnificient side benefit of mobility and portability. Great job!!!