Took a bit longer to figure this one out but I found it
couldn't take the background off the top searchbar without breaking facebook somehow but im happy with that smoked and the bottom transparent as you can see in my pic.
rename to Facebook.apk copy to sdcard
use root explorer to move it to system/app
Here's the Froyo version sorry for those that tried the other on Froyo not sure why it wouldn't logon but after many told me it dont work I tested it again myself the d/l guess it doesn't work but this one will work for Froyo the old one works on 2.1 roms ok.
rename and install using root explorer, copy to system/app then set permissions and reboot