pda net is a tethering app ^^ but works fine for non secured websites.
but for mifi or wifi hotspot, root with a custom rom like Cyanogenmod (when it comes out) will have that ability. I have it on my aria and that was one of the coolest most useful advantages of that. plus 2.2 and aps2sd on an aria. now I have an aria on steroids(Inspire 4G of course) and can't wait for the potential...