> The more I think about it, the more I think it'll just be 
> best if I get some
> kind of development board that has a mmc flash + LCD + 
> keyboard controller ...

Sounds  amuch better idea than trying to reinvent fire 
yourself.

Somebody else mentioned using a PC as a starting point.

This can be an extremely effective way to get a prrof of 
concept demonstrator working. There is a risk that you may 
do something that is hard to do on an embedded system 
subsequently but that seems unlike;y from what you describe.

You can either simulate the target system on the PC OR

Use an interface to send basic control data to and from a 
prototype by whatever interface is best for you. This could 
be a cable (pay no attention to the man behind the curtain / 
inch thick cable going to that PC over there) or a wireless 
link (whether radio, IR etc). You can then have a system 
where the demonstrator is effectively a "dumb terminal" with 
the work being done on the PC. Done well it can be 
inobvious, to a point that you are 'cheating'. You would, of 
course, want to point out to the clients that this was a 
concept demonstrator and that the 'man behind the curtain' 
was still extremely necessary at this stage.


        Russell 

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