Currently used wallpaper location

[houserhythm]

Hey guys,

Does anyone know where Android keeps the wallpaper that's currently being used? Or at least what format is used, so I can search for it? Tried looking for jpg, bmp, png but didn't find it.

I gave openHome a try and uninstalled, but I really liked the wallpaper from a theme and was happy to see that it stayed after uninstalling openHome. Now I'd like to try some other wallpapers, but also wanna be able to go back to this one. Hence the above question, so I can save it someplace.