Like many of my peers, I have used Gabcast as a tool to generate mp3 files from phone calls. It's been a great resource, to have a toll-free number that students can call from any phone, and then their voice becomes an mp3 file that is ready to become a podcast episode or a component in a classroom video, or whatever. With so many high-quality microphones (in the form of cell phones and land lines) around, why not use them?!
But as of March 1st, Gabcast is no longer most-favored for classroom use:

Purchase minutes? Wha? When free services become for-cost services, most educators look for the "exit" sign. And I'm no exception.
So I found two good options for capturing voice: K7 and Drop.io.
K7This is the
answering machine I've been using for some time--I've just never used it for students to call. It's really, really easy to set up, and the results are pretty cool: You get a phone number with a Seattle area code that people can send faxes to or leave messages on. If they send a fax, it comes to my email. If they leave a voice message, it comes to my email as a WAV file.
My students were doing the
Film on the Fly competition this weekend, and we had success getting voice files from cell phone to computer this way.
Drop.ioI love my Drop.io boxes! There's a post about drop.io in this blog from a while back, but I wasn't specific about what it can do with cell phones. Students can call a phone number and leave a message, and it becomes an mp3 available to everyone with access to the drop (which can be completely public or hidden behind a password). A cell phone can MMS (texting with pics or vids) to my drop.io-issued email address, and the pics and vids show up instantly in the drop. From there they can be linked to, embedded, or downloaded. Gotta love it!