Adding Notes to Profile Summary
You could look at this extension which lets you modify the layout of the Contact screen, and in doing so lets you pull in Dashlets from Reports
The problem i can see though it that there is no obvious report builder for Notes.
Depending on your CMS you could potentially do this via a CMS tool such as Views in Drupal, and then add the Block as a Dashlet on that Summary Layout tool.
I have not tested the above but it is one concept to rule in/out. Otherwise a small extension that modifies the templates involved may give you what you need but would require someone with developer skills. Good luck.