(Disclaimer: I'm not involved in Marvin (apart from having translated its UI to German) and I certainly can't speak for Kris.)
First of all, a release is usually done when it's ready. So asking for release dates or timelines usually doesn't make any sense. It's ready when it's ready.
Secondly, there are quite a few ways to contact Kris. You'll find them on
http://marvinapp.com/ at the bottom of the page. Contacting him via email for example has always worked for me - even when he was very busy and not active here in the forums. Which leads me to...
... thirdly, which is that Kris has a regular job, a family and lots of plans. Not being active *here* doesn't mean he's not around or not interested in people's opinions and questions.