We've created this Forum Thread with some workarounds and advice to assist you in publishing you ebook.
Publisher's address in print/ebooks
In the template for a paperback, it has a box saying: publisher's address here. It then points out that Lulu is the printer, not the publisher.
So do people who are self-publishing put their _own_ addresses there, register a business adress, pay for a P.O Box number, put an email address, or... what? Please.
And also thank you.