OK so heres the first thing i'v ever done with photoshop...
You can use it for whatever on your site :huh:

be as harsh as you want... i'd like ot know how crappy i am


(it uses clouds so its random ^_^)
so here we go:

start with a 500x500px dcument

Fill with black (Ctrl+F5 and fill with black)

Filter > Render > clouds

Filter > Distort > Sphereize

Filter > Artistic > Neon Glow

Use your elliptical Marquee tool and click from the top right corner and drag down untill you've highlighted the whole Sphere

Ctrl+c (copy) > Make a new layer > Ctrl + v

Delete the First layer "background"

Filter > Render > Difference Clouds

Filter > Render > lighting effects (mess with the settings until you get a cool effect

Heres what i used



And ok.. thats it

This is what i got with some different Lighting effects