These units run very hot. It is a design flaw... I have mine sitting on top of a set of video tapes (insert you jokes here

), the tapes get it off the surface increasing airflow around the unit. It must also be sitting on top of the furniture where it is not covered, enclosed or in direct heat from something else. I would wait the 90 days for the warrantee to run out before you open the case. You will need to do a search here for updating the unit. It is quite easy and you can install up to 150 gig using either one drive or two depending on what size drives are available. Also be sure to install a cooling fan when upgrading the hard drive. Good luck and enjoy the new unit and if the unit is brand new get your rebate slip in asap. Also read this forum daily as well as past posts. All the particulars and quirks about these units are in the archives.
upgrade:
http://rtvpatch.sourceforge.net/utility.html
http://replayfaq.reidpix.com/faq.asp
$100 rebate for a brand new unit:
http://panasonic.com/consumer_electr.../promotion.asp
Open box buys also are ok for the rebate. Search here to find out how some did it. I believe your bill needs to say "Open Box Buy" to show Panasonic that there is no barcode to get the rebate. Like i said research it here and give Pana a call to confirm what they want.
(rebate url needs to be one line)
good luck
mark