Gary from MSNBC checked out the ZyXel P-2000W Wi-Fi VoIP handset:

ZyXel’s Prestige P-2000W v.2 is a pretty sophisticated handset. It not only handles WiFi and VoIP connections it also supports the open standard SIP (Session Initiation Protocol), which interoperates with major SIP-based call servers, IP-PBXs and various VoIP client devices..



Link: MSNBC