[Orgmode] How can i share a single org-default-notes-file between multiple instances of emacs?

[Eric Holbrook]

At work i typically need to have at least 2 emacs running: 1 for the
project i'm working on at the moment; 1 for notes, email, ~/.bashrc,
~/.alias, etc.

I often have more than 1 project going at a time, so i end up with 3
or 4 emacs running, sometimes more.

I'd like to be able to do 'org-capture from any emacs, and have them
all dump into the same org-default-notes-file, which i have creatively
named notes.org.

How can i do this? I thought of possibly setting a defadvice tied to
notes.org that tells all running emacs to unceremoniously revert that
buffer before doing anything else to it, and to save it when done with
it.

Has anybody already solved this problem?

tia,
Eric