This month I am studying “Developing iPhone web apps with ExtJS”
This is an online class with interactive instructor sessions that supposedly takes six months to complete. Sort of a boot camp for ExtJS on iPhone.
I spoke with the instructor and he states it takes an average student about six months to work through the material and a good student about three months.
Update: Wrapped up and submitted my last piece of coursework two days before the end of the first month.
Logged 56 hours of class time, study, reading, practice and interactive sessions with the instructor.