You can easily make a full theme out of hookable modules. Like fractal said, check out xlabel's readme, specifically the "Hook Modules On Labels" section. Just keep in mind, when you hook something in to a label, its x/y coords become relative to the label's viewable area, not the desktop. (Like if you hook lsxcommand in to a label, x/y 0/0 will stick it in the top left corner of the label.)