A few weeks ago, I posted an idea from Someday Crafts' blog that I really wanted to try. After much deliberation, I gave it a shot. I took some creative liberties with the idea and instead of using vinyl, I used stained glass paint. It didn't turn out too bad:
I learned a valuable lesson about the tile; do NOT try and wash it out. There is no way to get that water out from inside and it leaves water spots. The velum helps but you can still see (in person, not in the photos) that the water is still inside.