long time agot there was some french site called
linuxshot.org (it still exist but its noe the same site with old screenshots), currently it has only 1 FVWM screen and very common I must say, but the old
linuxshot.org contained such great FVWM configs that none of the other WMs or DEs could comapre with them
Even Mac OS X or E17 looked poor comparing to that configs.
Also
arsen.gentoo.pl has some nice setups too, also FVWM forums has lots of nice FVWM configs.