The Sony Touch PRS-600 might suit your needs. You can annotate on books as well as scribble notes separately with the stylus. So yes you could make grocery lists - not sure how good it would be as a journal, depends how much you want to write I guess.
It also features an SD card slot.
I really like the physical keyboard for annotating on the Kindle 2 but it doesn't have a separate note function - you can only make notes in books. And it doesn't have expandable memory either.