I have the same. Red PWR, very dim green OK. No boot. Mine never booted. It was like that when I unboxed it yesterday.
I use a 1200 mA mobile charger and tried both with or without my SD card, which is an 8GB micro SD in an SD converter.
I tried leaving it off over night, but that didn't change anything.
I might have touched the silver cap at first plugin, but could that really be so fragile? And is there any more solid information about that problem?
Cheers,
Anders