This tutorial is usefull for creating an interface pattern,
I hope I can explain it clearly here. Anyway, at first you have to understand
smooth edges tutorial, otherwise....it won't came out good. Everytime
I type SMOOTH, then you have to smooth it with some steps from the smooth
tutorial.
If you have any question, don't hesitate to ask me....I
would love to help :) Enjoy
1) Create a new layer and an interface...with any style....hehe :)
Mine...fig 1, then SMOOTH it (fig
2)
Fig
1 Fig
2
2) Ctrl+click that layer, then go to Select > Modify >
Contract (I used 8 pixels :: fig3). Create a new layer then fill it with WHITE
(fig 4). Copy that new layer for future
use (**look at layers window fig
5)
Fig 3
Fig 4
We
gonna start working on Layer 3 copy.....
Fig 5
3) Now select Elliptical Marquee Tool 
then create a
circle with shift key press down on the center of the interface.
(fig 6)...then delete the selection area
by hit delete key & SMOOTH it
(fig 7)
Fig 6
Fig 7
4) While in that layer (**Layer 3 copy**) , create another
smaller circle than the prev one (Fig
8), then click on Layer 3 (fig
9) and ctrl+shift+I to Inverse the selection
(fig 10)....hit delete key to delete the
selection (fig 11)
Fig
8
Fig 9
Fig
10
Fig 11
5) Ctrl+D then SMOOTH it....and
voila....you will get similiar like mine :
Fig 12.
here is what I got...messin' around with this stuff hehe 
BATMAN....wooooozzzz 
and something else.......
*sigh*
....hope this tuts usefull for ya....