Telltale release on digital service are usually five part releases (Sam & Max, Strong Bad, Secret of Monkey Island and now Back to the Future). In the past they never failed to deliver, so it's not too bad, it just allow them to start releasing the games sooner for the fans I guess. But yes, it's sad that it's not coming to WiiWare anymore
(I have a PS3, but it was giving a reason for Wii user to be happy). Though with Nintendo stupid size limitation, it was just a matter of time before Telltale left the sinking ship. FOr those without PS3 though, all Telltale games are available on PC too, and that include back to the future.