I am writing a module that will, using javascript, create a slide down container at the top of the page. (modelled on the login here http://xenforo.com/community/).
Rather than hardcode the content in this slide-down region, I'd rather just create a new block region, and let the user put whatever blocks into it he/she sees fit.
The thing is, this sort of thing would normally be done with the theme, not with a module. Is it possible to define a new block region using a module, and if so, how?