Steam overlay doesn't work for me in wine. Yeah, I guess, it's known bug, but some persons say I need to compile wine with right gcc. Some of them just download the latest deb-packaged wine and the overlay works flawlessly for them. I tried to compile wine myself, but it didn't work. Now I have the latest wine installed (ver 1.5.6 from PPA) but this overlay still doesn't work. (My English is not really good:))