Nintendo has made available some 50 WiiWare demos via the US Wii Shop channel. The reappearance of these previously-released demos is a surprise move considering Nintendo was so adamant that demos would only be available for a limited time in the past.We're hoping this is a sign of their permanent availability, but if you enjoy having a quick play of a game before you purchase it you should get all over this quick - they might not be there for long. Nintendo launched a trial WiiWare demo scheme in 2009 in a bid to stimulate sales of downloadable titles, which it said made up just a small part of its business.