Answering machine / voicemail --> email?

[Nick Triantos]

Hi all,

I'm running a decently fast server with FreeBSD 5.4.  I'd like to set up 
a way that the box can act as a voicemail server, and turn the messages into 
emails.

I see Asterisk as a possible solution, but it seems awfully heavyweight for 
what I want.  Are there any lighter-weight ways to achieve this?

If Asterisk is the way to go, what's the cheapest modem card I can buy (for 
a PCI Express-based Dell SC 420) that can answer the phone, and let the machine 
receive these calls?  It's for use in my home, so it's only 1 analog phone 
line running into the house right now.

thanks,
-Nick