Anthony Desnos is an Android geek and coder who works at VirusTotal. He created the infamous Androguard toolset for reversing Android malware, malware analysis and goodware analysis of Android applications. He is very active in releasing tools.
Created a VM called ARE for Android reverse engineering.
Wrote a reverse engineering tutorial for Android using Androguard here: http://code.google.com/p/androguard/wiki/RE#Reverse_Engineering
Contributed an article to Phrack Issue # 68 : http://www.phrack.org/issues.html?issue=68&id=15#article
http://code.google.com/p/androguard/