Audioboo is a great alternative to audacity. It is considered a web 2.0 tool and it is free.
Do you have lessons that you want to podcast (which means to audio tape yourself) ?
Do you want student to show you what they have learned auditoraly?
The following video will take you theough setting up an account and making your own Audioboo.
You can connect your Audioboo to iTunes, a blog, a wiki, or as an RSS feed.
If you have a smart phone there is an app for this.
A great tool and easy to use.
http://teachertrainingvideoscom.createsend5.com/t/j/l/chyfy/ddituur/z/