Yeah, its pretty awesome. Nice combination of 2D/3D visuals, its just too bad you can beat the game in well under 8 hours (unless you collect all the star coins, then it might take 12-15 hours, my guess).
I enjoyed the game too, i still miss a handfull of star coins and since i don t really know what they unlock i won t bother.
Anyway, the sequel... you can sit on that... but there s gonna be a new Yoshi Island, kinda perverted since you have baby donkey kong and such in there but it might be fun.