For you road warriors out there, this sounds like it could be a winner. PCCW has come out with a new device called Netvigator Everywhere that seamlessly switches between their WiFi, HSDPA, and 3G networks.
The service costs as low as $328/month for Netvigator customers, but you must sign a contract for 18 months to get this price. There is also a separate one-time charge for the Auto Network Selector, seen here:
NETVIGATOR Eveywhere’s state-of-the-art technology means you can go online anywhere, thanks to coverage from Wi-Fi, HSDPA and 3G platforms. NETVIGATOR Everywhere "intelligence" will automatically detect and connect customers with the strongest signal from the three platforms and migrate from one to another wherever you may be to maintain stable and reliable online connectivity.
For detailed information on the plans available and general information, check out the NETVIGATOR Everywhere site. [ ENGLISH / CHINESE ]