Thanks to a reader's question, I've checked the news on Gilberto's birthday, and according to Globo.com he's doing a mini tour of 5 to 8 shows in Brazil between August 29th and November 30th. So far five cities have been confirmed: São Paulo (Sep 3, HSBC Brasil), Rio (Sep 10, Rio Vivo), and dates are to be announced for Salvador, Porto Alegre, and Brasília.
The tour is called 80 anos – Uma vida bossa nova and there are plans for two DVDs to be recorded.
Glad to hear that he's well enough to tour at 80.
Good luck if you're trying to get a ticket, and let us know how it went.