If rumours are correct it looks like Apple will release a whole new line of notebooks later this month. The rumour from the Taiwan-based Apple Daily suggests that Apple will release new notebooks later this month whilst offering some specific details of updates.
Rumours of updates to the MacBook, MacBook Pro and MacBook Air have been circulating for several months whilst the report from Apple Daily claims that a constrained supply of 32nm Arndale parts was to blame for the delay.
Apple Daily also mentions that the update notebooks will likely offer drives up to 640GB or SSDs up to 248GB. Battery life will be pushed up to eight hours across the whole line. The article refers to the introduction of Intel i3, i5, and i7 processors earlier in the year but doesn't assign any to particular models of MacBook.