Hi,
i'm a new user (bought Atv yesterday and already hacked it).

I'm seriously worried about the external temperature. Hacked or not, it really gets hot, and the fanless structure doesn't help.
It is supposed to stay on stand by, but i prefer to shut it down.
Do you think there may be problems ?

General rule with Apple products is "If you can hold your hand on it for 5 seconds, its not too hot."

Don't place it on top of other equipment,Sat receiver, amplifier , Dvd or VCR , and definitely don't place anything on top of it.

Zeljko

__________________
Officially Unlocked 3G, Model MB489SO, 2.2 --> 2.2.1 --> 3.0 B4 --> 3.0 B5 --> 3.0 GM
Macbook Pro 15.4' Core 2 duo 2.2GHz, 4GB RAM
aTV 40GB, 2.0.2 (2.3.1 OTB),USB support, rTorrent, nitoTV, XBMC 9.04.1,
OpenSubtitles_OSD for XBMC and Plex
USSD for Mac

No worries. Apple TV is known to get really hot. I always put my coffee cup on top to keep it warm. In terms of energy saving I cut the ac cable and put in an on/off switch. Works perfect since years on my former Apple TV 40GB, since 1/2 year with 250 GB HD ;-)

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iPhone 3GS factory unlocked (3.1.2; Blackra1n, Cydia, OpenSSH, custom 3.0 ipcc file (no sig), tethering hack by Dev team, 32 GB)
iPhone 3G (3.0.1; Redsn0w 0.8, Cydia, OpenSSH) 16 GB

i'm glad to hear this.
actually, over my Atv there is the speaker's control unit and the access point. Both of them gets very hot too, so i'll place it another way.

thank you.