i got mine in august 2008 and i have to keep it on separate table next to tv. yet even when it's "stand-by" the middle back top (in front of the SCART) is burning hot.
my friend upgraded to the service few weeks ago and his box is LOT cooler even when it's on.
i've tried to query Sky several times in past year and so but they just shrug it off.
luckily i did not buy the unit as my own, so if it fries, i'm good.

other thing that bothers me; every morning the unit does some sort of "boot", waking me up.