I've been silent for quite a while. That does not mean I have not been busy!
A lot of efforts has been put on TimeSeries over 11.70.xC3 and 11.70.xC4 and we are still going full steam ahead. We continue to improve its performance, scalability, usability and functionality.
I wanted to put together a repository of information so people can find it all (or most of it in one place. For this purpose, I put together a wiki on developerWorks that is dedicated to The smart meter support. It is still a work in progress but I believe it is a good start. you can find it using the tinyurl: tinyurl.com/InformixSmartMeterCentral.
Let me know what you think.