OMG! I saw this in Guy Kawasaki’s e-mail signature (he surprisingly responded to an e-mail I sent to Alltop). SpinVox (UK residents go to the main SpinVox) can convert voice mails to text. This just might be worth the money. It also has a Memo feature, but I am not sure if it sends memos to the inbox with sound or with text.
I tried the test, but it didn’t work.