iPhone 2.1

Downloaded it and installed it a few hours ago -- here are my impressions:

• 3G signal strength is dramatically and noticably better. I used to maybe get a bar or 2 in my office and it's up to 5 bars.
• 3G voice calls are not dropping. Areas where I was dropping calls from the day I got the iPhone no longer drop.
• The 3G and Edge icons changed on the screen. I'm sure this is totally cosmetic, but I noticed it.
• The whole system seems snappier -- there've been times in the past weeks where the phone has been so bogged down that I can type an entire sentence on the keyboard and it takes 4-5 seconds for it to actually show up on the screen.

I'm leaving the 3G on all day today to judge battery endurance with the new update.