Record MP3 lets you, without having to register, create an audio recording that you can save on your computer and/or save on their site (a link is provided). It’s very simple to use, though I’m not sure what the maximum audio recording length is nor how long they keep it on their server.
My recording uploaded quickly using Internet Explorer. However, it would never upload when in Firefox.
Nevertheless, I’m adding it to The Best Sites To Practice Speaking English.
Thanks to Educational Technology and Mobile Learning for the tip.