http://www.animenewsnetwork.com/news/2009-12-15/viz-confirms-kirby-manga-and-novels-by-hayashi-otsuichi
old news, but I just heard of it, we have the Zelda and Pokémon manga, maybe the Metroid manga will be next
*Update*
Sorry for the double post/bump but it looks like it will come out next year, http://www.viz.com/products/products.php?product_id=9313
Good thing you updated, I looked all over for it yesterday. Toys R Us here has a manga and comic book section next to their gazillion Mario toys.
*update*
there's actually a lot of fan manga as well