links

these are some links worth sharing:

list of dalvik opcodes:
http://pallergabor.uw.hu/androidblog/dalvik_opcodes.html

smali / baksmali project page. great tool for disassembly:
http://code.google.com/p/smali/

apktool project page. uses baksmali / smali but also can decode resources:
http://code.google.com/p/android-apktool/

good community for mobile apps:
http://forum.mobilism.org/

dex2jar for converting dalvik code into java code, sort of:
http://code.google.com/p/dex2jar/

excellent place for reversing forums, blogs, tutorials:
http://www.woodmann.com/forum

detail-rich reversing blog with lots of android content and general reversing:
http://strazzere.com/blog/

a good start for looking at native assembly:
http://www.eggwall.com/2011/09/android-arm-assembly-trivial-program.html