Trying some ideas for prefix solution

prefixed.css

h1 {
  -webkit-border-radius: 10px;
  -moz-border-radius: 10px;
  -ms-border-radius: 10px;
  -o-border-radius: 10px;
  border-radius: 10px;
}

body {
  background-image: -webkit-gradient(linear, #000, #fff), url('image.png');
  background-image: -webkit-linear-gradient(#000, #fff), url('image.png');
  background-image: -moz-linear-gradient(#000, #fff), url('image.png');
  background-image: -ms-linear-gradient(#000, #fff), url('image.png');
  background-image: -o-linear-gradient(#000, #fff), url('image.png');
  background-image: linear-gradient(#000, #fff), url('image.png');
}


body {
  display: -webkit-flexbox;
  display: -moz-flexbox;
  display: -ms-flexbox;
  display: -o-flexbox;
}

prefixed.scss

h1 {
  @prefixed(border-radius: 10px);
}

body {
 @prefixed(background-image: linear-gradient(#000, #fff), url('image.png'));
}

//Ambitious
body {
  @prefixed(display: flexbox, ($official: false, $oldwebkit: false));
}

neat! I think @chriseppstein came up with a more elegant solution:

div {
  @include prefixed {
   border-radius: 5px;
   display: flexbox;
   background-image: linear-gradient(#000, #fff);
  }
}

My intention was to not split property and value, and try to apply the prefixes automatically to a declaration.

That is elegant. If it can be broken down into an array seems like it wouldn't be too hard to spit back out with proper prefixes. You and @chriseppstein working to bake this into Sass/Compass? That would be awesome :)

Essentially trying to find a less unwieldy solution to setting prefixes!