Are there any plans for an update of the VOIP stack for the E70?

I truly love this phone. It works almost flawlessly, but there are things that are feeling like dealbreakers. Things like wifi/SIP MWI and being able to receive SIP/SIMPLE messages in my inbox would be incredibly useful (instead of being rejected with error 400). I was really disappointed to see that this functionality isn't present in my device. From what I understand, the VOIP 2.1 stack has fixed these issues. I would love to see that on my device and am hoping Nokia is working on an update.

I have a Nokia E70-2, RM-24 for the US, running software 2.0618.07.10 and what appears to be the 1.0 version of the VOIP stack as detailed on this page: