i have the same problem. i have now bought the plantronics headset and a sony one... both have the same problem. i go into sound options and i select LINE IN as the mic source and nothing happens.. the level slider is up to full but still nothing. the earphones work fine, its just the mic on...
I have the same "going to sleep too soon" problem with my powerbook. I have turned off the sleep on both the battery and power cord mode and it still goes to sleep in about 5 to 7 minutes.. only my computer doesnt arouse from its sleep after that... i have to shut it down and start it up again...