Well, today I started work on the design and prototype for a mass-produced NESp. Features:
-Vacum-Formed Case
-A 72-pin neofami
-Will have a hipscreen (possibly with an Led mod)
-Will use 4 AA alkaline batteries (not rechargable)
-Will use smaller speakers than the Hipscreen ones
-Will have A/V out
-Will have A/C adapter port
-Will have external Controller inputs
-Will be slightly bigger than an orignal GBA
Note: this is all for the standard version.

The cost will probably be about $50-70 if you provide a screen and Neofami. That price will include the other parts that I need, but not shipping. There will be the following options for about the prices in parenthases:
-A/V in ($5)
-Switchable 5th battery allowing for use of rechargables ($7)
-Built-in battery charger ($5)
-Custom case colors (depends)
-I provide Neofami and Hipscreen ($60-75)

I will probably be done with a first prototype by the end of my christmas break. Production will probably start soon after that. The prototype will take that long because I have to make a vacum former, case molds and I have to design the circuitry.