The ETA's website can be found he

http://etaaircraft.zoecom.com/

As far as I know they have build at least 6. Giorgio Ballarati placed
2nd in an eETA in the Open class at the Worlds in Sweden this year. The
broken boom was a result of leaving the required flight envelope during
spin testing and supposedly had no implications for the certification.
They reinforced the boom anyway.

The project to watch is Dick Butler's Concordia Open Class glider
combining the powress of Dick Butler, Georg Waibel (the retired W of
Alexander Schleicher) and Luk Boermans (the dutch airfoil guru who,
among others recent designs, was responsible for the super eliptical
wings and high performance airfoils of the Antares). Going by the names
they'll have a good chance of upping the ETA.

Markus