Just read in the morning papers that the City of Zagreb and the Republic of Croatia (current owners of ZAG) are working on a proposal to outsource the operation of ZAG - a move that would finally the construction of the oft-mentioned new terminal.
As per the CEO of ZAG, Mr. Tonči Peović, the airport and its operation would be outsourced for a period of 30 years, a deal worth €392 million. The prevailing opinion is that the new operator is most likely to be a foreign company, as no local ones are said to fulfill the requirements stipulated by the state. Whoever gets the concession will also get partial ownership of OMO (Mostar Airport, Bosnia) and the Soko aircraft factory (also in Mostar, locally famous for producing the G-2 jet trainer and the J-22 light strike aircraft) - as well as significant shares in OU, and €20 million currently on the accounts of Zračna luka Zagreb, the state-owned company that currently manages the airport.
It is also implied in the article that the new operator will be bound by the terms of the concession to finally build the new terminal (as if the sight of the current terminal wouldn't be a sufficient impetus).
Quite an interesting development, worth keeping an eye on... (even though the snail's pace of Croatian bureaucracy - and the mandatory greasing of the palms along the way - will probably mean that this whole deal is years in the future...).
EDIT: here is the mentioned article, but unfortunately only in Croatian...
[Edited 2011-05-12 00:38:06]