I love the grass concept. I think real grass would look better - I actually have a photo I got @ istockphoto of grass - but I don't know if that is outside the rules.
I would love to play with another version of the grass concept where a bolder font is used, and the grass is inside the font, or the shape of the grass is on top of the font in one shade of color, and the the font is another shade...
HOWEVER... what I was thinking is that the grass would be at the bottom of the letters and grow up in the letters, and the letters would keep their shape.
See examples below:
Bottom of letter "i: Bottom of letter "v"
|__grass____| \____grass____/
I hope that makes sense - but yours was a cool execution I had not thought about.