A quick one for you right now. In thinking through Emory's implementation of iTunesU, one of the big problems is determining what specs we will require for the media and then making it easy for people to convert their media into the appropriate formats. We're hoping that we can identify good software solutions that are affordable and easy to use. In doing that thing I do here, I stumbled across Zamzar.
This web site converts--for free--files from one format to another. JPG to BMP. DOC to DOCX. XLS to CSV. WMA to MP3 to M4A. And so on. They then email you your converted files. The advantage of the site is that you don't have to have specific software for the conversion process. This is especially useful for when you need to convert a file and are not near your own computer. The downside is that the site has too many ads and pop-ups for my taste.
You can also use upload to Zamzar directly from URLs. This means that you can potentially use it to save, convert, and download audio files that are only meant to stream or YouTube videos. This, of course, is legally problematic and may violate copyright law. And of course, Zamzar is indemnified against legal action that might be taken against you. Nevertheless, you still might find a use for it.