Very nice tool.
Here some suggestions:
1. No limitations to screen size in height and width (like
fuseurl.com)
2. Use two grids for layout definition
a. First grid is list of url's (2 columns, symbol and url)
e.g.
SYMBOL URL
BBC
www.bbc.com
ABC
www.abc.com
CNN
www.cnn.com
ZDF
www.zdf.de
b. Second grid (15 rows, 5 columns) gives row and column layout
e.g
50% 50%
1000px BBC ABC
1000px BBC CNN
2000px ZDF ZDF
From here you could generate the script with row and column for
compatibilty.
Regards