I do think it goes a hair over the line with branding. I’d place “From Brides.com” on the bottom, like a credit. Or maybe make it a rounded header to form a sort of chrome for the space, and size down the name ever so slightly—but not let the sponsor name appear to be a part of, or to compete with, the title of the widget.
A company doesn’t get into a widget strategy without making sure it gets something out of it, but finetuning to the point just south of overbranded is tricky, isn’t it?