Number of presidents prior to FDR who had weekly radio addresses: ZERO
The Fireside Chat was a unique and purposeful invention of FDR to ease public distress during an economic crisis by using what at the time was considered non-traditional media for politicians. If Obama does talk about moving into the White House, his Blackberry and his kids, then you can bitch, but right now you're claiming A) the Fireside Chats were something less than they were and that B) the Obama appearance on Leno is something that has yet to be. I believe that's what baseball umps call an 0 and 2 count.