Harmonix has posted a notice on its official forums that as from tomorrow, it'll cease releasing Rock Band Network songs onto the Wii, pointing out that the small demand didn't equate to the number of man hours spent converting the tracks over.
As sourced from Gamesindustry.biz, the news came on the tail end of a forum post announcing the upcoming tracks.
The post read:
"Next Tuesday, 1/18/2010, will also be the last scheduled batch of Rock Band Network songs brought over to the Wii. With the smaller online install base, limited demand for releases so far and the significant amount of work it takes for our producers and audio team to convert and process these additional tracks we're no longer able to continue submitting RBN content to the Wii. Regular Wii DLC, and RBN releases for the 360 and PS3 will continue uninterrupted."