SubEtha SMTP and Wiser are not dead at all. It's very actively maintained (for a project that is essentially functionally complete) and has no known major bugs. I'm working with a contributor to add AUTH support as well as doing a re-write with apache mina as the core networking engine.
As for maven... well, the pom.xml files were donated by someone else. I personally hate maven and wouldn't use it if my life depended on it (and yes, i understand how maven works and have tried to use it). If you guys want to see the latest version of subethasmtp up on the iblibio repo, then you get to figure out how to make that happen.
As for JDK 1.4 compatibility... the ant build files will produce a jdk 1.4 version using the retroweaver stuff. it works great.
As for the LGPL... it's an issue for the ASF to depend on it. I'll eventually change the license to an ASF license, so don't worry about it. Go ahead and use it.
Oh and I was the one who started this project ya'll are working on right now. So phewy on you Dion. =) =) I'm just glad to see there is still people who use and develop it.