IMac (MB323LL/A) very hot to the touch. What are the normal temps?

I have a 20" iMac (MB323LL/A). When I feel the back of it (specifically the top-left corner, opposite of the DVD/CD drive), it feels extremely hot. The picture at http://tweetphoto.com/20424550 is a screen shot of the temperature readings. The program is iStat Menus.
Are the temperatures displayed in the screen shot normal?
I look forward to your responses. Thank you very much in advance.
- Ted

I am dead positive, those temps are just fine
*Now me, I'd not be so sure:)* One must use search intelligently & make their own assessment. My thoughts are here:
http://discussions.apple.com/thread.jspa?messageID=11627340
and elsewhere & I said I'd not post about iMac temps again, so sorry for this. It was too hard for me to let a statement like the above stand.
E.g. I'd occasionally seen *CPU temps like yours, 90°C*, prior to using 3rd party fan control. *Please note that even exceeds Intel's maximum storage temperature* of 85°C for Core Duos (lower if storing > 1 yr), from:
http://download.intel.com/design/mobile/datashts/30922106.pdf
but at least its below the recommended maximum junction temp of 100°C.
Your *PS temp of 83°C* is ever-so-slightly below it's capacitors' maximum operating temp of 85°C, "+For an *aluminium electrolyte capacitor at 85°C, an expected lifetime of 2000 hours is achieved* by selecting VR / VF = 0.8.+":
http://homepages.eee.strath.ac.uk/~bwwilliams/Book/Chapter%2016old.pdf
and elsewhere.
Your *HD bay temp of 54°C* is above the maximum even considered in the google HD failure rate study:
http://static.googleusercontent.com/externalcontent/untrusted_dlcp/labs.google.com/en/us/papers/diskfailures.pdf
see other refs in my post I linked to above.

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