[plt-scheme] collaboration and virtual Scheme meetings?

>> We'd like to use DrScheme (or some other editor) in a similar way like e.g.
>> SubEthaEdit (via Bonjour)

Anyone know how hard it would be to add something like that to
DrScheme? I mean, DrScheme already has the "action" abstractin in
place, so it might not care so much about where the action originated
from (keyboard or packet listener)?