Without any notice TwoOSTwo websites .com, .org disappeared.
The development team, Parallels Ltd., instead is always there and still provides news about a “virtual machine” product, but there is no Downloads section available.
Anyway if you like here’s the direct link for the lastest version: http://download.parallels.ru/files/twoOStwo-2-30-40B.exe
Thanks to Raffaele Valensise for ths news.