I've recently been using mia_roundcorners a lot especially with text to fake beveled edges. what it does is modifies the polygons normals so that where there's a sharp edge it adds a roundness to it come render time, it does not change the geometry so for close-ups it's not the best but looks good from afar, a good example is below. I used mia_roundcorners on the ends with the Rolodex logo to catch some highlights without having to go in and add little bevels to the text.
the mia_roundcorners gets plugged into any textures bump map input and you can set the radius of the bevel in the node itself, if you want to map another bump map, that can get fed into the mia_roundcorners nod or if you're using mia_materialX put the mia_roundcorners into the over all bump and your normal bump into the "standard" input. this is using mental ray for maya
