I took a look at this as something I want to use in a site I'm building, primarily as an example. I thought the implementation of widgets fell short -- do you really want people modifying your module's directory to add their widgets? That kind of sucks.
CTools provides a great plugin system to allow modules and themes to provide widgets. This means themes can SHIP with customized vote up/down widgets that fit for that theme and are simply selectable.
Finally, this corrects a couple of errors in the template file, such as not using t(). And I included documentation on the widgets.
Whether this patch is accepted or not, I'll be building a site with a module that utilizes this patch. I may release a vote_up_down submodule for another voting type, but won't be able to release it without this patch. However you want to do it.