"Is my auto-brightness sensor working?" That was a familiar refrain around these forums. Now, with 2.0 firmware, it's visibly different/better. Try covering the sensor with your thumb while the Touch is asleep or off. Turn it on - notice how the screen is dim. Go into any app or section, uncover the sensor, then go right back to Home. After a second you'll see the screen brighten right before your eyes. When coupled with the noticeably brighter screen under 2.0, it's clear Apple has made some real changes here. My first impression is for the better - but definitely different.