I can never find an easy way to do this on the rare occasions that I need to do this.
maybe I can rediscover the different ways and keep track of them here.

http://www.google.com/search?client=firefox-a&rls=org.mozilla%3Aen-US%3Aofficial&channel=s&hl=en&source=hp&q=mac+dos+2+unix&btnG=Google+Search
mac dos 2 unix - Google Search
http://www.macosxhints.com/article.php?story=20031018164326986
Convert end-of-line characters (revisited) - Mac OS X Hints
https://ccrma.stanford.edu/~craig/utility/flip/
ASCII text converstion between UNIX, Macintosh, MS-DOS