Tethering on a Mac

[whinecellar]

Hey Guys,

I used to use USB Modem for Palm to tether my Treo to my MacBook Pro and never incurred any add'l data charges from Sprint. Now they're telling me I need to pay an additional $45 a month for tethering when I already have an unlimited data plan?!?

I just got my Touch Pro and one of the first things I did is try tethering via USB Modem (downloaded demo) and it works great. Can I assume the same thing - that it prevents having to buy Sprint's $45 tethering plan? I thought I read somewhere that with the TP they might be watching a bit more closely and might have enabled some kind of "clue" to know when you're tethering...

Any thoughts?

Thanks!