4. You'll need to edit the data, then re-serve the page, in which case you use 'defop' (http://files.arcfn.com/doc/srv.html) or you can write the file out to your static directory.
[edit] #4: If you choose to use the static directory you may need to ensure arc is set up to serve out certain types of files (i.e. .js, etc). See http://arclanguage.org/item?id=10620. Anarki has already taken care of this, but arc proper has not.
I know the nginx comments add a little confusion to the post (as I wasn't sure at the time what was going on), but I don't think Apache vs. nginx was the problem.
In retrospect it may not be the library, it might have been scheme, but none the less when I switched to wget, the problem went away.