The first official (captured by camera/newspaper) note about her new tour comes from Madonna's drummer, Brian Frasier-Moore. Check out his interview at around 00:20.

And speaking of the new "era", Jamie King says the new album will be out very soon.
I suggest you to get new jobs in time. xD


~UPDATE~
Madonna looks about ready to announce an Australian tour.
A touring company insider has alerted Undercover to the soon-to-be announced Madonna ‘The Celebration Tour’ for July.
This will be the first time Madonna has been to Australian since 1993 and it will be her second ever Australian tour.
In total, 10 shows are planned with three shows for Sydney and Melbourne, two for Brisbane and one each for Adelaide and Perth penciled in.
The ticket price is said to be the highest price ever for a pop concert ticket in Australia with the cheap seats expected to go for $249, next level at $499, Gold at $999 and then an Ultimate ticket at $2000.
For $1000 more, Ultimate ticket holders can also upgrade to the Penultimate ticket for $3000 which will include a meet and greet, photo op and personally signed program from the tour.
The show is expected to be marketed as “a gift to Australia” for the years of touring cold shoulders.
The Australian shows will be indoor arena shows as opposed to the outdoor stadium shows she did in other parts of the world last year, hence the expensive ticket price.
The Melbourne show at Rod Laver Arena is also expected to be filmed for a live DVD.
All shall be revealed soon.
They suggest that;
* "The Celebration Tour" will be an intimate arena tour, visiting Brisbane, Sydney, Melbourne, Adelaide and Perth.
* The tour will be marketed as a special "gift" for her Australian fans, who've waited almost 17 years to see her.
* 250 tickets will be given away to charity at each show.
* Ticket prices will be the highest ever seen in Australia (starting at $249).
* The tour will continue to overseas destinations, but on a larger scale (they name London, Paris, New York, Los Angeles, Berlin).
* One of the Melbourne dates will be filmed for a future DVD release.