Avatar Approval module upgrade path from Drupal 6 to Drupal 7

I am testing upgrade process from Drupal 6 to Drupal 7, and just encountered an error
"Column not found: 1054 Unknown column 'a.fid' in 'field list': SELECT a.md5 AS md5, a.timestamp AS timestamp, a.moderator AS moderator, a.fid AS fid FROM {avatar_approval}"
on /admin/content/avatars page in D7. I inspected the code and immediately realized that the schema is not migrated from D6 to D7 (there is no hook_update_N() that should be responsible for that).

1. What is the plan to provide upgrade path from D6 to D7?
2. What can be done before the automated upgrade path is working? (i.e. will something like uninstall in D6 to wipe all data out work, or is there an SQL statement that can be applied to the database directly? If there is some data in the D6 avatar_approval table, it would be nice to know if it can be simply dismissed without losing all avatars)