Since the last time we mentioned it, the MyTether app for WebOS phones has gone up in price from a requested $10 donation to $14.95, but that's still considerably cheaper than Verizon's $40 per month Mobile Hotspot plan. We're still leery about what usage/overusage could mean for your contract & bill, but a new beta version has been posted that officially supports the Pre Plus and according to the developer "makes use of the API calls behind MHS" to let it work more smoothly. Even with the Pre's openness to hackery we had some issues getting the beta installer to operate on our Windows 7 machine but once it was installed it worked as promised, giving comparable speeds to a dedicated EV-DO card on the same network. Other new features include automatic tracking of data usage and the ability to manage connected devices directly on the app. Other than some compatibility issues with WebOS updates there hasn't seemed to be any blowback from Sprint or Palm on this app so far, we'll see if Verizon has any issues with its premium priced turf being encroached upon.
MyTether beta

Source: Pre-Hacks