Like whats the point in making them and showing them off on here, but not sharing on cydia? I don't understand. You can add them to the repository, yet nobody shares.
cydia isn't the only way to distribute and/or download a theme. themes can be distributed and downloaded from the download section of mmi (or, at times, from the theme posts themeselves) and then ssh'd or sftp'd to your iphone. i like the sftp method better than using cydia... then i can tailor the theme to my own liking before installing onto my iphone.