I've started shooting a lot of my landscapes handheld, now that I am using an Alpha (Sony) camera with built-in image stabilization. Especially since switching to the Alpha 550 which can shoot at ISO 800 with few IQ compromises and has a very soft mirror action. . .
Anyway, after switching to shooting more handheld images of the last couple years, I decided to take some panoramas handheld (single row). And what do you know, it actually works just fine! During my recent trip to the Smokies I took three handheld pano series and one on a tripod. Wouldn't you know it! The only spoiled (camera shake) frame was taken on the tripod (with remote release!) Fortunately I overlap extensively so was able to use the two "neighbors" and blend them together without the bad frame. . .
Moral of the story? None in particular. But I must say I am greatly enjoying the freedom to shoot more of my landscapes handheld without all the fuss and time consumption of getting out the tripod every time. . .
Now I fully admit that when my shutter speed dips below 1/40 or so I will use the 'pod. But it's nice to do without it when I can.