Rev A, 167 degrees F is actually about 77 degrees C, so maybe that's not out of the ordinary for some of you, but my MBA is totally unbearable on my lap and totally not normal for me. Screensaver wouldn't work and kept shutting down Safari with a kernel panic. Ended up doing permission repair; then resetting by pressisng option + command + r + p, then going into library and removing desktop.plist, screensaver.plist since these were the two files that weren't allowing the temperature or fan to stop going haywire, b/c they were searching and searching to find these files, but the files may have been corrupted or bad, so my MBA kept searching even harder and faster b/c that's what it's suppose to do. I removed those files from the library to the desktop, then restarted my MBA and noticed the temperature was now down to 123 degrees F and the fan was running at 2502rpm in about five minutes. I then dumped those two files and the caches file into the trash and emptied the trash and went about business as usual. No explanation as to the cause, but this is the 2nd notable kernel panic related problem, but RESOLVED for now...