i have the same heat problems with my esprimo v6535 (Pentium T3200, 2GB RAM), especially in the left area of the touchpad/palmrest.
i thought the cpu is getting to hot, disassembled the machine to find out the exact RAM type for upgrading.
i found that under the hot area sits the wlan antenna! turning off wlan
reduced the temperature quite a bit, even on full cpu and ram load.
so guys, go back to wired lan or enjoy the esprimo only during long winters