the first official version of the qcar sdk was just released a few days back. it brought some great improvements on the tracking performance and on the list of supported devices. right now every android phone running android 2.1 - 2.3 should be supported.
that's one reason why i'm pretty busy at the moment. the process of updating existing projects to this new version takes a while. the second thing keeping me working is actually quite exciting for me. next week we will use an augmented reality application the first time to actually present a project we did for a design class at university. i hope by the end of next week i'll have a video for you ready showing you what we did!
as i recently realized the interest in virtual buttons seems to be pretty big. after i was not so happy about them at my first try i decided to give them another chance and prepare something after next week.
if you have any suggestions just send me a message.