I decided to quickly check my plugins for V2.1 compatibility and here is what I found.
- Akismet Version 1.2.1 should be okay.
- Feedburner Feed Replacement I have versions 2.1 and WordPress 2.1 needs 2.2 or later.
- Google Sitemaps I have version 2.7.1 and WordPress 2.1 needs 3.0b5.
- ImageManager Version 2.3.7 is
okay. Updated: I just installed upgraded a site to WP 2.1 and there is no button for Imagemanager. It appears Per has it working but he is still testing the change. - Sidebar Widgets Version 1.0.20060711 is okay.
- WordPress Database Backup I have version 1.7 and WordPress 2.1 needs 1.8 or later. Current version from Il Filosofo is 2.0 and WordPress 2.1 will not include the Database Backup plugin.
From this list I can see I only have to get three updated plugins.