This release says that Mobilkom Austria will build the "industry's first fully integrated Wi-Fi/cellular platform": If you read closely though, this isn't about seamless roaming from a Wi-Fi network to a cellular network but it's about backend integration. So a single backend billing, subscriber management and customer care platform will support both the Wi-Fi and cellular services offered by Mobilekom Austria.
Also, this announcement sneaks in the tidbit that Mobilkom Austria will be offering Wi-Fi in McDonald's restaurants throughout Austria.