you must see this!! http://www.multiblocks.com fantastic graphics! or look here at youtube: http://www.youtube.com/profile?user=multiblocks while graphics and overall game quality is really impressing, the tetris modes itself are a bit lacking: no wallkicks, strange keyboard layout, no lockdelay etc. but man. this guy really has a talent in 3d graphics. and hey - he has a blockout mode.. sure, its lacking playability a bit and one rotation axis, but he has shipped that thing, while i am too lazy to finish mine...
I prefer Zetrix for eye-candyness. Alas, it's a discontinued project. It has a nice particle and lighting effect though,
yes, thats a really great idea! and relatively easy to implement if using opengl or directx3d: just rotating the 3d camera...