yeah man i wish i did my research before too,i just bought
Griffin Elan Form with EasyDock for iPhone 3G (Black) | TechNGnet ,Ofcourse need something COOL to cover the back since now i have permanent scratch on the back,seems OK i guess,seems decent enough and also protective by reading around the net.i also got
iPhone 3G Skin,which i heard does same as invisible shield,only cheaper,i was thinking of also putting that on if i could with the case,(but not sure that will work),but you know what,EVEN after i bought these two things,its cheaper then naked-case :P,hopefully everything goes great,if you guys want ,ill tell you how are they,and post picture if you like,might take a week or so though.
by the way,just a little note,sometimes things work ,sometimes they don't,but if you got something you really love,you dont want to take any chance's with that 