Interested in making Podcasts, recording a class, or an interview? I've been using a great system called Audio Acrobat. You can record by either calling into the system or recording directly from your computer (using a microphone). After the call, you just sign in using their web interface to access your audio file -- files are usually accessible within minutes of ending the call.
Audio Acrobat makes it easy and affordable (plans start at $19.95 per month) for everyone to digitally record information and share it.