“Well it’s about time”, is probably what everyone is thinking over this topic.
Demos to WiiWare are being introduced but at the moment only as part of a trial in hopes to get more visitors using the Wii Shopping Channel.

This is to try and get people looking at other games more when shopping as opposed to the majority which just simply go there to buy the games they already know they want.

There would be only a limited number of titles to begin with seeing as it is only a trial, and is due to launch in Japan later this month.

Source: GamesIndustry.biz