Have you looked at the SELF implementation of morphic...
at least thats what I think it is. The desktop/background
stretches out in all direction. Then one can scroll 
to the appropriate place and work there. 
I can't remember the URL and it's one hefty
download and only for Mac and Unix (Sun) (?)
but worth a look:-)
Karl

Krisztian Flautner wrote:
> 
> Hello,
> 
> Regarding the problems that people have been experiencing
> about the screen on a PDA being too small:
> 
> I was wondwering how difficult it would be to create a
> Morph that would zoom the contents of a project and allow
> interaction with the objects within the project through
> the zoomed interface. In other words, the zoomer morph
> would look like a project view before one enters it,
> except that one can interact with the morphs in it without
> having to enter the project.
> 
> I envision a rectangle that could be sized to the physical
> screen of the PDA. The bottom of the rectangle would include
> icons to zoom the view in and out, and some other buttons
> to support click modifiers (like a button for an ALT key,
> right, middle mouse buttons etc. maybe shortcuts to a few
> other things). One could move around the zoomed view by clicking
> on the four edges.
> 
> This morph would allow us to start using the existing stuff
> on the small screen. Eventually we can add extra support to
> morphs to do intelligent resizing. For example, depending
> on the zoom level, less important information is progressively
> discarded and/or less important information gets small faster
> than more important information.
> 
> What do you think?
> 
> Is there something in the existing image that comes close
> to doing this?
> 
> Later, -- Kris