Jott is a nice free service – how it works is you call an 877 number and talk. It then emails/text messages you a transcription of your text.
This is cool in that it’s a quick way to take notes without having to listen and process that information later (beats a voice memo hands down). Plus it collects and organizes them, and if a transcription is poor, you get an online audio recording as well.
I’m not sure that many people would find it useful, but I do.