Apple reveals that its Personal Hotspot feature for the iPhone 4 will only support three Wi-Fi devices. You can get an additional two devices if you use both Bluetooth and USB.
On the road, in an airport, at the park now you can bring Wi-Fi with you wherever you go. Download iOS 4.3 on your iPhone 4, and the next time you find yourself without access to Wi-Fi but in 3G territory, enable Personal Hotspot and share your cellular data connection with your Mac, PC, iPad, or other Wi-Fi-capable device. You can share your connection with up to five devices at once over Wi-Fi, Bluetooth, and USB with up to three of those connections using Wi-Fi. Every connection is password protected and secure. And its power friendly, too. iPhone detects when your Personal Hotspot is no longer in use and turns it off to save battery life.
Read More [via Engadget]