Recently there has been rumors about Nintendo dropping Friend Codes in favor of a unified code system. Now there is a confirmation of Nintendo supporting Netflix in the not too distant future (read Spring 09). Nintendo has also started to institute free demo's on their wiiware service. Further the Nintendo Channel updates have been relatively dry recently.
Could Nintendo be planning a UI overhaul to coincide with the launch of netflix wii. Possibly streamlining the software built in the wii to more dynamically supply information regarding the latest title and such to the average consumer.
I think this is quite possible and maybe more likely than we anticipate. Their Channel Developers haven't released anything new since possibly Wii No Maa, and with all this recent development rumor wise of Nintendo streamlining their online process, I think it bodes well for an upgraded User-Interface in the not too distant future.