I just made the switch. I too am on the sprint sero plan, it only took about 30 minutes for them to switch me over to their "new system" and then I was all set. I now have the $30 bb plan added to my $30 sero plan. The $30 bb plan also includes sprint navigation which is kinda cool. My biggest mistake was switching from a bb 8700g to the treo 700wx in the first place.