just found, going to try it now and will report back in a few hours...
If you encounter an issue using Personal Hotspot with other Wi-Fi devices, try the following:
Turn Personal Hotspot off.
Verify Wi-Fi is on in Settings > Wi-Fi.
Turn Personal Hotspot back on.
If another device is unable to join your Wi-Fi network, ensure that the user enters the Wi-Fi password correctly. If the device cannot see your Wi-Fi network, verify your device name.
Note: Windows may not properly display a device name that uses non-ASCII characters.
Verify how many devices are currently using your Personal Hotspot. The maximum number of devices is five for all connection types.
Depending on your wireless carrier, the maximum number of Wi-Fi connections may be limited to three Wi-Fi devices at one time.
If the other device still cannot connect, try turning Wi-Fi off and on again on the device. Verify that your device can see other Wi-Fi networks.
Note: If you leave the Personal Hotspot screen or put iPhone to sleep, iPhone only broadcasts the Wi-Fi network for an additional 90 seconds. If no devices join the Wi-Fi network during that time, iPhone 4 stops broadcasting your Wi-Fi network. You can start broadcasting your Wi-Fi network again by tapping Settings > Personal Hotspot.