E-mail from Jobs says Apple will soon send upgrade to 3G users to fix issues with iOS 49
The response from Apple's CEO was brief. While "Software update coming soon," was all that was written, it would seem that Jobs is talking about iOS 4.1 which currently is being tested by developers. The 4.1 betas have apparently shown improvement with their performance running on the iPhone 3G, and that is great news for those who have been experiencing problems with the new OS on their old device.
Apple iPhone 3G Specifications | Review