Pockets is a great little site that I found out about on Twitter from Ozge Karaoglu. This is a fun site to leave voice mails over Twitter. The way this works is you type in a Twitter user's username (try mine if u like dkapuler) and then record a voice mail after Pockets calls you over the computer. Then when a recipient checks their Twitter feed they will see a link which will then retrieve their voice mail.
I highly recommend giving Pockets a try by clicking here!!