It's a shame, but seeing as how print media is slowly dying, I guess they felt it no longer had enough readers to support it. Not surprising, seeing as how Gamepro died last year and EGM is on the verge of a second death.
I enjoyed Nintendo Power, subscribed to it for years after first subscribing to get the Donkey Kong Country guide (I had read it in stores and nabbed issues from a friend before then), but I dropped out of it after the move to Future. I still enjoyed thumbing through it in stores, picking up the occassional issue if it interested me. I might pick up the last couple of issues, if just for nostalgic reasons.
Speaking of nostalgia, get ready to see back issues of NP spike up on eBay in the next few weeks.