Opera notes are stored in a plain text file in your \Opera7\Profile directory. You could create a shortcut to this file and open it in Wordpad, then cut and paste to print out what you want. You can also select text on a web page, and choose to print the selection.
For a tip on how to do this click here using notes see my thread on inserting Unicode characters in the Customising Opera Forum click here
Note that Opera 7.50 preview 2 has just been released. If you don't mind taking risks with pre-release software, take a look: click here