SwfObj just received some needed bug fixes. You can view some notes on the changes here. Or just go and get the latest version.
The first part in the WordPress 2.5 Media API tutorial series. This article discusses how to customize the tabs available in the WordPress media library using hooks made available in the latest WordPress release.
While developing the SwfObj WordPress plugin, I realized there is a large gap in documentation on WordPress media library API. In an attempt to help fill in that gap a little, I am developing a tutorial series based on the API hooks I used to develop SwfObj.