I've been worried about this too.
The 360 uses crappy non-leaded solder, which is very brittle when it gets hot.
Leaving it in a hot room, or running it in a hot room, is a sure-fire way of speeding up those 3 Red Lights of Death.
I'm considering moving my set-up into my basement, which is always nice and cool during the summer, unfortunately my basement floods at least a couple times every year.