Thanks for your very good tutorial.

Theres one different way of doing the reflexion:

If you use the "perspective tool", you can ad a little non reflecting border on top and it looks nice to: http://img232.imageshack.us/my.php?image=bubbletut3dl4.jpg

This would lead to: http://img250.imageshack.us/img250/7744/sphere2nf6.th.jpg

Greetz,
Mondspeer