Got Voice - online & mobile voicemail and voice messaging

What they say:

"As the pioneer in voicemail and voice messaging online services, GotVoice allows you to read your voicemail instantly on your cell phone or in email, receive all of your voicemails as MP3 attachments in email or listen to them online, forward as MP3, save voicemails forever, make one call to reach everybody at once (broadcast calling), leave a message without ringing someone’s phone (silent delivery) and even customize your voicemail greeting by adding your favorite MP3 music (or audio clip from our library) as a background track."