Lpc2000

Can someone tell me how much current the GPIO pins can source? Do any 
pins drive more than others? 

I've looked all over the docs and archive and don't see an answer. 
I'm using the 2138 but I imagine all families are similar.

I was surprised when a friend told he had a PIC that would drive an 
LED directly @ 20 mA (but only one at a time).

thanks, Tom