My last post about this went "thud" :-)  That's OK, I decided I'd just
try it for a while.  After two days I have to say that the idea of
saving workspace contents to class-side methods is working pretty well
so I published WorkspaceAsMethod to squeaksource.

In Squeak 4.1 install with:

Installer ss
    project: 'WorkspaceAsMethod';
    install: 'WorkspaceAsMethod'

>From the Workspaces class documentation:

This class simplifies storing Workspace contents in class-side methods. 
Right now there is no UI support so you have to do things manually. 
Begin by creating a class to house your workspaces.  Make it a subclass
of me.  In this example I'll call it TmpWorkspaces:

Workspaces subclass: #TmpWorkspaces
    instanceVariableNames: ''
    classVariableNames: ''
    poolDictionaries: ''
    category: 'WorkspacesDemo'
   
Now create a new workspace by evaluating:

TmpWorkspaces openNewWorkspaceSelector: #firstWorkspace label: 'First
Workspace'.

If you browse the TmpWorkspaces class you'll see a class-side method
called firstWorkspace.  This is where your workspace contents will be
saved.  Modify the workspace and 'accept' your changes.  The class-side
method will be updated accordingly.  You can close the Workspace without
fear of losing anything.  To re-open it just:

TmpWorkspaces firstWorkspace

or

TmpWorkspaces open: #firstWorkspace

To open all workspaces just:

TmpWorkspaces openAll.

The #openAll method assumes that your workspaces are all in the method
category 'workspaces' so if you move them they won't be opened by this
selector.

David