c99koder has posted a detailed description about FrotzDC Saved Game uploader on our forums. Here is that description.

Worried about losing your FrotzDC saved games? Wish you could use your UNIX Frotz saved game on your Dreamcast? Introducing the FrotzDC Saved Game uploader! Now you can use your PlanetWeb browser to upload saves from your VMU to share with others, and you can upload UNIX Frotz saves from your PC and have them converted to VMU files! Check out the new Saved Games section on the FrotzDC page!

Sadly, WinFrotz seems to use a different save format from UNIX Frotz, so Windows users are out of luck for converting their saves

Sometime in the future I’ll adapt FrotzDC to load games from the VMU so that people can download and exchange Z-Machine games as well as just game saves.

-Sam

Check out c99koder’s FrotzDC page here.