主な内容は、ノート作成画面の変更でチェックリストや表作成が便利になっているようです。
Improvements:
Redesigned note editor interface
Redesigned login/registration window
Allow adding and deleting of rows and columns in tables
Quick checkbox list creation (hitting enter on a line starting with a checkbox automatically inserts a checkbox at the start of the new line)
Lion Full Screen allows multiple windows
Bug fixes:
Notebook popup menu in note editor now displays notebooks in their stacks
Fix a bug where changing a note's created date failed to cause it to sync
Fix a bug where selected tags in shared notebooks would not stay selected
Fix Quicklook support for notes in Spotlight and the Finder
Fix a bug that sometimes caused context-menu operations to use the wrong note(s)
Fix a bug that prevented screen clipping from working on Lion
Fix a bug that broke search when search text starts with "source" and some other values
Fix a bug that prevented checkboxes from printing
Escape key in search box clears search
Other bug fixes
Stability improvements