asterisk users - Jul 2009 - MWI using Asterisk and external mail server

We are upgrading to Asterisk as our company phone switch.  We have our 
own Auto-Attendant, call center and voice mail servers.

One issue that we are having right now is our voice mail server sending 
Asterisk the NOTIFY to turn MWI on our Polycom SIP phones.

I see from the research I've done (including previous posts here) that 
Asterisk did not support external MWI events.

Is this still the case?  Is there anything in the works currently to 
change that?

In the end, all we are looking for is to have the ability to turn on and 
off the MWI light on the SIP phones.

Thanks,
Dean