In the blog of Janson LANGRIDGE, you can see an application called wmwifirouter. It is quite interesting that your windows mobile device can act as a router, you can share your network connections (such as 3G or GPRS) through WiFi ):
- Share your cellular data/Internet connection over WiFi
- Connect any WiFi-enabled device with Ad-Hoc Mode support
- Supports multiple devices at the same time
- Easy to use: for most users, getting up and running is a matter of a single click
- Power saving: works even when the device is susponded!
- IP, WiFi and cellular configuration built-in
- 64-and 128-bit WEP encryption support
- Automatic reconnect on connection loss
- Compatible with almost all recent Windows Mobile Devices
- Distinction between basic and advanced users
- Keep-alive support to Prevent Automatic disconnects for specific carriers
- Battery Monitoring and Management
- Support for sharing your cellular data connection over Bluetooth and USB
- Support for sharing your WiFi connection to USB, and vice versa
- Multi-language support
- Ability to feed Internet to your normal wireless router, with WPA Encryption
- Live traffic statistics
- Live DHCP statistics
- Port mapping support
- DMZ support
- Apptodate automatic update support
See: http://global.wmwifirouter.com/features/
Enjoy!