Msg#: 3811891 posted 9:29 pm on Dec 20, 2008 (gmt 0)
I'd have no fear about Google's reaction here. Taking a site from 20 page to 40 pages is not a problem. Sane redesign is also not a problem, as long as you don't change the existing urls. Constant tweaking can be a problem, but not one time improvements.
I'd say do the redesign and add the new pages in one clean shot. Then let other websites who might link to your content know about it.