We do, but the carriers will want $20-25/month from you if you try to enable the feature. It's rather lame, wanting to charge you again to use data you're already paying form especially in this era of data plans being capped anyway,

This nonsense is easy enough to get around with on Android (many third-party ROMs have Android's built-in tethering feature enabled) or BlackBerry (this Tether company makes a BlackBerry app that worked well for me in the past.)