Dhruin
SasqWatch
Omega writes in with this article from German site Xboxdome.de, which summarises some information from a Polygamia.pl interview. According to the piece, Arcania should have a demo, is targeted for a Q3 2010 release and, since the X360 is the lead platform, the controls have been carefully designed for console use. If I understand correctly, the final decision on the demo will be made around E3.
More information.
More information.