I've got the Seeduino Arch Pro, so I would quite like to do an Arduino API for LPC1768
That board looks very promising:
Seeeduino Arch | Seeed Studio Wiki
I haven't looked at the LPC range for a while, I just noticed the new LPC11U68
Also a nice board:
LPCXpresso Board for LPC11U68 | NXP Semiconductors
Strange that the have the arduino pin out and not an arduino lib.