I've noticed this on a few different configurations. I don't notice it as much with my personal MacBook Pro, but my work MBP with the US 2-prong adapter as well

I've noticed this on a few different configurations. I don't notice it as much with my personal MacBook Pro, but my work MBP with the US 2-prong adapter as well as my work Mac Mini both tingle when I touch them or shock me through my keyboard pretty consistently. I just had my helpdesk replace the MagSafe brick for the MBP, so I'm interested to see Monday if the shocks go down. I sure hope so - I've become trained to fear the first touch to my keyboard.