[plt-scheme] How difficult would creating a collaborative multi-user online virtual world application be in PLT Scheme?

One question that has been coming up at the back of my mind for the
past several weeks has been how difficult would it be to create a
collaborative multi-user online virtual world application in a
semi-functional programming language, such as PLT Scheme.

More specifically, last August, I came across a very interesting
application called Croquet (see
http://www.opencroquet.org/index.php/Main_Page), which happens to be
based on Squeak (see http://www.squeak.org/), a dialect of Smalltalk.
Croquet, in turn, provides the basis for Cobalt (see
http://www.duke.edu/~julian/Cobalt/Home.html), a "virtual workspace
browser and construction toolkit for accessing, creating, and
publishing hyperlinked multi-user virtual environments" (according to
the home page for that project).

What struck me as especially interesting was how Croquet allows
multiple users to collaborate together in a multi-user online virtual
world in software development and other collaborative projects.  As
one application, the video clip on the upper-right-hand corner of the
above-mentioned Croquet home page illustrates how a user can, by
writing code from inside the application, create on-the-fly additional
virtual environments, which can then be entered by either the
programmer or other programmers.  Other applications (shown in other
video clips on the "Screenshots/Videos" page (see
http://www.opencroquet.org/index.php/Screenshots/Videos) show
alternative applications that include text-based annotations, a 3D
spreadsheet, and writing a conventional blog from within a virtual
world.

Unfortunately, Smalltalk is an object-oriented language.  If possible,
I would like to see something similar in a more functional programming
language such as PLT Scheme.

Does anybody know whether duplicating this project in PLT Scheme would
be feasible?

-- Benjamin L. Russell
-- 
Benjamin L. Russell  /   DekuDekuplex at Yahoo dot com
http://dekudekuplex.wordpress.com/
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