Where can I get more information or help?

Post your question to the mailing list(s). There are two, one for users (slicer-users@bwh.harvard.edu) and one for developers (slicer-devel@bwh.harvard.edu).
To subscribe to the users' mailing list, send email to slicer-users-request@bwh.harvard.edu with the word subscribe as the subject.
To subscribe to the developers' mailing list, send email to slicer-devel-request@bwh.harvard.edu with the word subscribe as the subject.