Do you have a trusted repository or wiki that recommends apps for specific handheld devices? For specific disciplines? To meet targeted purposes?
Educause posted one of its famous “7 Things . . .” introductions about apps @ http://net.educause.edu/ir/library/pdf/ELI7060.pdf
Joyce Valenza recently recommended APPitic Directory of 1,300 apps @ http://appitic.com/
Kathy Schrock adapted an app selection rubric @ http://kathyschrock.net/pdf/ipad_app_rubric.pdf
Where do you find your apps?