NXP has posted a training video with overview of the LPC23xx and LPC24xx series. It is short about 30 minutes of introductory information but if you are new to the NXP chips the time is well spend watching it.

Couple of highlihts:
- discussion of the Flash memory including desing details, MAM accelaration and code protection CRP.
- discussion of on-chip busses including local bus dual AHB1, AHB2 and DMA
- new peripherals Ethernet, LCD, UDB OTG/OHCI, External Memory Interface

Particular attention in the presentation is being paid to performance enhacing features.

NXP web page with tranining video click-here. 

There is also a companion presentation in PDF format click-here.