Hello
I wouldn't count on long term availability of this particular LCD given that
this is largely sold as a replacement part for a product that is getting old.
That's the point! The PSP was such a big hit you'll certainly find
spare parts on line for a long long time, at very decent prices. Look
at the gameboy advance.
And unlike brand new LCDs , the specs will match, because they are
sold for replacement!
However, given the response, I might reconsider things.
It seems to me I am not alone looking for a simple extension board,
with additional UARTs, MMC, LCD, I2C. Ideally it would support a
simple COTS remplacement LCD, but would also feature a LVDS port for
advanced uses.
Maybe you should just ask people what they need, and what would their
pricerange be?
Which do you tihnk will sell better - $100 kit, LCD included, that
can be plugged to the bb directly, or a $200 kit which requires
specific LCDs that may or may not be available in the future?
I'd provide a third choice, a LCD kit that includes the LCD and behaves
better.
Sure that's better, but the only important things are 1) price 2) availability.
And then again, unless you intend on building thousands per month,
your limit will be LCD. COTS replacement parts are usually a good idea
for any research project.
Søren made a good point with iphone replacement screens. Unfortunately
there are too many different models. That's why I had suggested the
PSP screen. You could also consider the PDAs LCDs (dell, ipaq...) or
the netbooks LCDs - say eeePC 700 replacement screens. You'll
certainly find them for some time too.
A good test is ebay and google: the more sellers, the most available
is the screen. And you can simply indicate to the people purchasing
your board to get them online 
The signals feeding the LCD connector and the DVI are the exact same signals.
So different res simultaneously is not possible as wired. The TRM alludes to
alternative wiring where the signals can be muxed between multiple LCDs but
things are not wired in a way that the muxing would work.
Thanks for your clarification. I hadn't fully understood that.