Don't try Muninn, it's already taken for something sorta similar: http://code.google.com/p/muninn/
That being said, they're not in a related area, so I doubt anyone would be excessively confused between both, as opposed to say, Go[1] and Go![2].
What I'd do, personally, is try to find another name and only keep the current project name if I can't find a better one that's not already taken. It makes it easier to rank well on Google and is less likely that someone will apt-get the wrong project.
[1] http://en.wikipedia.org/wiki/Go_(programming_language) [2] http://en.wikipedia.org/wiki/Go!_(programming_language) [3] https://www.google.com/search?q=huginn+download
It's confusing.
Muninn would seem like appropriate alternative.