This was something I wipped up quickly at work when I needed to calculate a digest and knew that I would need to do it again occassionally. I posted it here having come in at the tail end of a CB converstaion and thought it might help the person asking the the MD5 related question so it got posted in a hurry too.

I'm pleased to see it's been so popular and I appreciate the feedback. I'll put together a more fully featured version at some point adding in your suggestions and fizbin's ideas and the ability to calc the MD5s for a folder full of files too. The code won't be quite so compact, but usage can remain similar.