I have a couple friends with the Eris that went from loving their phones to hating them shortly after receiving the 2.1 OTA upgrade. They were quite happy with 1.5, but were looking forward to 2.1 - because I bragged about the improvements in the leaks. I was playing around with their phones last night and they were having serious lag when scrolling, receiving calls and switching from portrait to landscape mode. I turned off window animations completely and those issues went away immediately. The phones are now pretty speedy. If you're looking for that setting, it's under: Settings > Sound & display > Animation > No animations.