Drakino,
You want to visit
Symbol and take a look at their VOIP 802.11b telephones. They can hook in to Cisco Avvid using the Cisco's skinny protocol and their sound quality on even a large, busy site is better than mobile phones. They also support seamless roaming and user independence - grabbing an individuals address book from a central server so phones can be distributed among staff easily.
Good quality kit - for enterprise, or your personal use. If you use 802.11 round your house anyway and have a permanently-on connection to the internet then you're laughing.
_________________________
Rory
MkIIa, blue lit buttons, memory upgrade, 1Tb in Subaru Forester STi
MkII, 240Gb in Mark Lord dock
MkII, 80Gb SSD in dock