Congrats on the new release, I couldn't be more excited about the new import jekyll command! I just tried it out on my existing octopress blog, but it reported an error - it sounds like I opened the _posts directory in Finder one time:

$ hugo import jekyll --verbose --log=true ~/Documents/Blog/ ./
Importing...
ERROR: 2015/12/13 Parse filename error: .DS_Store
filename not match

Not sure what behavior would be best there (I suppose this is to catch the case where the importer isn't able to infer what kind of file it's seeing), but maybe this could be made a warning and not an error.