That's a great idea Bill, the gallery seems like a good way to do this.
Re the hard copy photobook, it would require a little bit of design and formatting but say, a facing page with the winning photo and on the other facing page two smaller sized photos to accompany the winning one, both facing pages repesenting one topic for each week's challenge. 52 weeks a year, double sided pages, it would be a minimum of a 52 page book which isn't that big. Or if single page, a 104 page book, still not a large number of pages at all. This is of course not counting the contents page, foreward from Charlie Waite (hehe), index pages etc.
Anyway just a thought. I think the photos from members here have been fantastic.