A couple weeks ago I hacked support for Geocoder.us into OpenGuides.
Admittedly, this is only useful for US guides, but it has made my life
infinitely easier when adding guides - before I was keeping two tabs
open and checking out Geocoder for each address, now that's taken care
of in the backend for me.
I'm merging my forked version of 0.47 to 0.51 today, and this is one of
the changes that other people running US-based guides might want or
need. I've attached a patch. It's not the cleanest solution in the
world, but it's something.
It should merge nicely against most versions, since the code surrounding
it hasn't changed much.
I don't know if this is desirable for the main branch, simply because
most of the guides right now can't be helped by it at all, and the code
is simplistic enough that it could be reproduced by anyone with a small
amount of effort. However, it's here anyway.