You get about 5 pieces of grass... yay? If you're lucky enough to get seeds from it, good luck sowing without any wood to make a hoe. I turned the underground into swiss cheese and managed to find a decent cave system, but no signs of any ravines or mineshafts. There are some other small islands a swim away, but none large enough for trees.
Traveling approximately due south I hit a small landmass with a desert, plains and some trees at x:-249, z:844. I then tried my luck traveling north, and hit a proper continent with mountains, forest, rivers, village, ravines and everything, after about 4000 blocks. Reached the land around x:-535, z:4285. Flying there in creative mode still took forever. I was tired at this point and didn't feel like traveling more thousands of blocks to look for land in the other cardinal directions from spawn, but nothing that looked like land was at all visible even from way up in the sky.
If you can make it to the continent, you will be rewarded by a nice blacksmith chest, though.
Ah, I figured that might have happened. I haven't tried that program yet, maybe I will give it a shot.
I just installed it in the last day or two. Handy to scout out terrain.
Also you can move the player location. So I try out seeds in amidst and if it looks really interesting I might check generate the map in Minecraft and take a look at the village chest. If it looks good, I see if there's a second village nearby.