The framerate looks good on the screenshot.
How many grass sprites are you using?

You might looks at Loopix's site for ideas on lighting.

Keep going. This is interesting.

Jim

I am using about 60 models with about 1800 faces each for the grass. I am not very happy with the fps, but I don´t know a faster way for the grass and it could be worse
Loopix website doesn´t really help me with good lighting, only with the very nice ground texture :P. I had an idea on how to make the leaves seem to have some more volume but I failed at it until now... I now think about implementing some simple normalmapping.

Normalmapping doesn´t work very well if the normalmap is not done with a lot of care, thus I dropped it.

You can download the compiled version and the code here:
http://files.filefront.com/Trees+V10/;10654914;/fileinfo.html

This was just a quick try for the 100 lines contest, because I had no better idea on what to do for it.
It is far not perfect, so feel free to improve things and I hope that you like it a bit

Its getting better At least the grass looks quite realistic!

yep, grass is awesome, only realtime grass shadows are missing

Thanks
realtime grassshadows aren´t really a problem, but the problem is to have them with a good speed and in 10kb and 100 ; s