Don't upgrade iPhone 3G to iPhone 4 software, warn users

If you have an iPhone 3G and feel left out because there's not a big problem to complain about like iPhone 4 owners, then just upgrade your phone to the iOS 4 software, which apparently can render the device useless.
Apple just announced that it is investigating reports from users who say that after upgrading their iPhone 3G to the new software that comes built-in to the iPhone 4, their device slows down to a crawl and makes it a cumbersome process to do anything with it. LINK