So I just woke up from a nap 10 minutes ago, went to my computer, and clicked on the ichat icon. it froze, which was weird, but really thought nothing of it. so, i went to force shut down the computer (holding down the power botton for a few seconds). i restarted it, then there was a blank white screen for about 4 mins, which came to a blinking folder with a question mark!! what is this?? Tried re-setting the PRAM, i think thats the correct wording, but nothing happened. Put in my mac installation disk, went through the whole thing, up until select destination and there was nothing. So, I went to Utilities, and disk utility, no hard drive is to be found! Looks like my H.D crapped out after 2 years. Thank god I have apple care and backed up everything on my external.