I maintain a debian package for my game, balder2d, but wouldn't claim to be especially experienced. I recommend reading the debian new maintainer's guide (I believe it has a tutorial), and if you need help check by #debian-mentors on irc. Once you get a package built you'll have to go there (or the mailing list) and find a sponsor to upload your package for you.
This site is useful as well: http://mentors.debian.net