Jeff,
Regarding task imports:
- The project tasks are imported into is specified by whichever Project select Import/Export tasks in (not from a column in the CSV file as initially thought).
- The actual column names and ordering doesn't matter as long as you have a column for:
- username, date (MM/DD/YYYY) and subject/description
- The upgrade process will prompt you to specify which column should be mapped to which field (see image below)

- The import task feature doesn't import Notes, only the 3 items listed above (standard used by MS-project and outlook of: subject + due date)
The import functionality should be pretty straight-forward, you could even export a set of tasks in Clearspace as an example. Let me know if there are questions.
~Long