iPhone 2.1 release details and upgrade procedure for v2.0.2

As promised, Apple has released iPhone 2.1 update via  iTunes 8.


General fixes:
  1. Decrease in call set-up failures and dropped calls.
  2. Better battery life for most users.
  3. Reduced time to backup to iTunes.
  4. Improved email reliability, fetching email from POP and Exchange accounts.
  5. Faster installation of 3rd party applications.
  6. Fixed bugs causing hangs and crashes.
  7. Improved performance in text messaging.
  8. Faster loading and searching of contacts.
  9. Improved accuracy of the 3G signal strength display.
  10. Repeat alert up to two additional times for incoming text messages.
  11. Option to wipe data after ten failed passcode attempts.
  12. Genius playlist creation [Illustrated by one reader] .
Security fixes:
  1. An application may be able to read another application's files.
  2. Multiple vulnerabilities in FreeType v2.3.5.
  3. mDNSResponder is susceptible to DNS cache poisoning and may return forged information.
  4. Predictable TCP initial sequence numbers generation may lead to TCP spoofing or session hijacking.
  5. An unauthorized user may bypass the Passcode Lock and launch iPhone applications.
  6. Visiting a maliciously crafted website may lead to an unexpected application termination or arbitrary code execution.
Other fixes:
  1. The texting memory leak problem seems to be fixed.
  2. Apps run a lot faster.
  3. No lag when srolling, faster launching of SMS app.
  4. New "3G" logo in the menu bar.
  5. Updating applications keeps their icons in place.
  6. App syncs still slower compared to media syncs.
I was able to update in minutes with no fuzz. Here's my updated About page:

What was lost:
The pineapple pwnage logo
Installer 4.0
Apps installed by Installer 4
Cydia and Apps? (not sure since I didn't have it in the first place)
Hacked App Store Apps

What got retained:
Apps from the App Store
Hacked Apps' Icons
Icon positions

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