Apple about to unveil refreshed plastic MacBooks?

The white plastic MacBook has been looking pretty lonely at the bottom of Apple's lineup ever since all the unibodies went Pro, but we'd been hearing Apple had some grand plans for the low-end -- and now AppleInsider says revised MacBooks in a thinner, sleeker shell have hit manufacturing and could launch "in the coming weeks" alongside that rumored iMac refresh. AI also says there are hints at a new-school integrated battery and a white plastic case, but we'll see what happens -- anyone think Apple might cut prices below $999?