I've been very happy with the combination of OF and Journler.
Notes take two forms for me, those that are transient and very specific to one action, those that are part of my larger learning reference of tips and knowledge that may apply to an action now, but to other projects and actions in the future. For the latter I put them in Journler, and I have a toolbar script that creates a new entry in Journler with a URL link in the notes field of the OF action.
http://www.journler.com/
Here is the OF toolbar script:
http://www.journler.com/community/fo...pic.php?t=3457
-P