It ain't exactly summer, but we'll take it. Launching just a few days after we'd been told to expect it, Barnes & Noble's PubIt! self-publishing portal is finally open for business. As you'd heard before, this platform is essentially designed to give independent writers a venue for hawking their masterpieces, with PubIt! converting files to ePUB for use on a wide range of e-readers (read: not only the Nook). Published titles will be available for sale within 24