Although the official line is that the bands are still in testing, by November every Disney Resort will be in the "test" and we will probably get the announcement that it is now rolled out for on-site guests. Rumour has it that off-site guests will not get magic bands as a matter of course, but will be able to purchase them for a fee.
The system still appears to be a little glitchy from the reports I've read, but I'm sure they'll be fixing those bugs over the next few weeks and by the end of November it will be full speed ahead.