drop.io has rich phone functionality. simply hit the 'drop it' button to setup a free conference call line (not recorded) and a voicemail line (recorded). use them as you please. you can even have your voicemail automatically forwarded to email addresses, twitter accounts, itunes (for podcasting), or your blog.
Classroom voicemail community. Teacher can use to leave feedback to individual student or whole class. Students can communicate with teacher or each other.
Voice-it allows you to record voice messages and archive it as mp3 attachments on SugarCRM or allows you to record voice messages from your website and send them to you as mp3 email attachments.
Voice-it is free and easy to install!