Whoops. I left out a

Whoops. I left out a step that is required to get FlashConduit working properly in the post below. You need to pass --flashconduit 4321 to mktap web to make the FlashConduit server side component listen on port 4321, like this:

mktap web --path=/path/to/web/files --flashconduit=4321

I'll edit the post below to mention this.