Well, first off, we can't really do anything about Grammar Girl. At least, we shouldn't.
Beyond that... If this site isn't improving on what's already generally available on The Internet, you should probably question its reason to exist.
During the private beta, strive to focus on questions that aren't well-answered elsewhere, or where you can clearly demonstrate both the need and the ability of the folks here to provide something both novel and useful. Long-term, this is somewhat less important, but it's still a good idea to remain aware of what else is out there.
And if nothing else, adding a link to a useful, relevant off-site article when composing an answer to a question can help folks who are learning find other resources to aid them in their quest.