Instad of using their web interface , I use Wine to run the Windows version of the software. All e-mail functions work normally. Juno can't connect on its own, but can use any Internet connection your Linux box already has running. Can't use Juno to connect to the Internet, Advertisements do not display most of the time, and flash by quickly when they do. I get an error message about unavailable fonts, but I'm assuming that's because I don't have a TrueType font server running.
Fonts are blocky, but readable.