Have no fear, Audio BOO is here.

Here is an interesting site (http://audioboo.fm/) that collects your brief audio recordings and makes them accessible to friends or students.

Audioboo.fm is the site, you can access it and record via the web and there are free client applications for the iPhone, iPad, and Android phones so you can record snippets (up to 5 minutes in length) and they will be uploaded to the audioboo web site.

Recordings are "geotagged" (location aware) so a google map can show where you where when the recording was made.

Here's a friend's audioboo example.