As you can see in the official page above, a favorite band for Greek music lovers, Walkabouts come to Greece again (been a while) in January 2012.
More specifically, on January 27 they will be on "Gaia", in Thessaloniki and then, a day later descend to Athens and the "Cyttaro". Official press release has not come yet, so we have no information on tickets, etc. Soon, more info ...
At present, "this is where it stops ..."
Relevant article