I've got the SERO plan as well. My guess is they'll make folks transition off of SERO (which was technically supposed to be for employees and close friends to begin with) to get the latest and greatest phone.

As for tethering, Sprint's been pretty liberal about it with current phones and plans, so it's certainly possible they'll continue that policy.

If the final version of this ends up being as good as it looks right now and it's under $300, I'm probably in.