Transparent Tables?

Does anyone know the location of a good tut for creating transparent tables as seen at www.shadowness.com ?

If not, can someone here provide a little guidance?

Thanks!

You don't have to make th background transparent in PS
Get your answer here >
http://teamphotoshop.com/forum/vbforum/showthread.php?s=&threadid=6731

Thanks Side...

What has me baffled is watching the shadowness.com page load. First a table background, then a gray block with light text-little contrast, then the final darker image (layer?) with the text highly contrasted and the graphic -- looking as if it is showing through a layer. Is this truly a transparent layer or only a placed flatten graphic after a slice was done? Thanks!