LR2/MogrifyHow did it take me so long to find this? Seems like the best way to add simple borders and text or watermarks to photos in Lightroom.
LR2/Mogrify is a post-process plugin for Lightroom 2 and later that can embellish your images as they are exported from Lightroom. It’s flexible interface allows you to add outer and inner borders, watermarks and text annotations to your images. It’s also capable of exporting optimum JPEG images that are no larger than your requested size; great for uploading to web sites that limit the file size.