you might remember some discussions that were had with regards to improvements to navigation throughout Moodle (https://moodle.org/mod/forum/discuss.php?d=233520 and http://prototype.moodle.net/clean/). Jetha Chan and myself have been writing a specification to make Moodle more user-friendly and we would really appreciate your feedback. The current draft can be found at http://docs.moodle.org/dev/Navigation_overhaul_specification.
You'll notice that some proposed solutions, particularly those to do with courses, do not yet have fleshed-out implementation details; unfortunately, this is due to the nature of navigation - many factors need to be considered when making changes, and we've added detail where possible. At present we've decided to prioritise getting community feedback on 'user context' solutions, which can be developed independently; feel free, however, to give feedback on both.
Please use the discussion page on the wiki, or this forum thread to express your thoughts.