So

Having played with some hobby apps in IOS I am fairly comfortable with Objective-C, Cocoa-touch etc.

I first started learning to code in C when Kernigan and Ritchie first wrote the book on it and when Slashdot still had IDs below 250,000

I like C, I am comfortable with it and I really dislike Java but not so much that I havn't used it.

What to do next for fun?

QT?
C - Good
Android integration - sort of
Cross platform - mostly
Limited API support - kinda
nice IDE - yes
Sailfish, Maemo/Meego - nice options (not concerned about WP)
LGPL - Confused, Ministro to deploy libraries or as a stand-alone, distributable application package (APK) and does that mess with my head about is it statically linked or not????
Open - well for now

Eclipse/Android?
Slow - no really slow and then it manages to slow down even more???
Open source - well sorta mostly
Future - Google beta of IntelliJ IDEA in the wings.
Java - yuk

IntelliJ/Android
Slowish - not really maybe
Java - yuk
Open - well for now.

Ho hum

rgds