The ListenUp software can record audio messages and upload them to a server. This can be used to implement a voice+email system.
We have created a simple example voice+email webpage that you may try for free. You can send an email to a friend along with a spoken message.
To record and send a voice+email message, click here.
The PHP source code for this demo may be downloaded from here. You will need to modify the code slightly for use on your own site.