This may help:
1.) Click on "Create a New Post" which you'll find just below the Red State Logo above.
2.) Click on "yourscreennamehere" Diaries. They should all be there.
3.) Expand the Create Diaries page to full screen.
4.) Click on Posts and select "All Posts", they should be there too.
Hopes this helps everyone at Red State find their old Diaries!