I am having the same problem with version 2.0.2. I have uploaded the Blix theme to /wp-content/themes/blix/ using an FTP program and made sure it wasn’t a folder within a folder (eg. /wp-content/themes/blix/blix/). Despite all that, it’s still not showing up in the Presentation page. I’ve found several mentions of this in the past few months, which makes me wonder if it is a problem with the 2.0.2 release.