Many users have reported problems with their iPhone 3GS and Wi-Fi, and Apple has finally acknowledged the problem. In their knowledge base they offer up a four step process on determining if your iPhone is affected. Affected devices will be able to see a wireless network, but will be unable to load from the connection.
On Apple's support website, you can view troubleshooting info to see if your iPhone is one that's affected. If you are unable to fix the Wi-Fi issue with the information supplied on the page, Apple recommends that you seek repairs for your device.
Via iLounge
Hutif
July 10, 2009 at 5:44pm
My iTouch and Macbook Pro have had problems with getting an address from my home Dlink router. It's always bothered me because I have the exact same model router at my work and it has never given me a problem. I was told that Macs are notorious for having network issues (this is my first Mac) so I just restarted my Wi-Fi and it usually fixed itself. Now I wonder if there's actually a problem. At least this will be helpful for my iTouch...
