Riverfold Software has released Wii Transfer 2.5.1.

Wii Transfer can share your movies, music, and pictures directly to your Nintendo Wii using the Internet Channel. Browse iTunes playlists and iPhoto albums on your television. Convert your movies to formats the Wii understands, either streaming directly from your Mac or for playback in the Wii’s Photo Channel. Wii Transfer can even manage saved game backups copied to an SD card. The software requires Mac OS X 10.4.

New in version 2.5:
• Drag-and-drop movie conversion for streaming
• Set background music for picture slideshows
• Browse Safari and Firefox bookmarks on your Wii

Wii Transfer costs US$19. When you purchase Wii Transfer you will receive a serial number via email right away to unlock the full functionality — sound in converted movies, support for playing more than 1 song at a time, plus iTunes playlists, shuffle, and watermark-free images.

More info and download link here.