[asterisk-biz] NAT Solutions?

[Barton Fisher]

What are you guys doing to solve residential NAT problems?
I'm looking at building a SER / OpenSER server with MediaProxy, but is 
this enough?
STUN doesn't seem to a complete solution. I'd love to able to send a 
phone or ATA without "one way voice" complains.
I've snoop around, but have not seen a 'Public' SER type solution, 
meaning I guess you need to maintain your own.

Any feedback is welcome

Bart