Thank you all for your help and comments on my other thread. I'm still playing with a variety of plugins for straightening out the images (right now, I really am enjoying PTLens and and Lens Corrector PRO (Both of which are really going to help me out with corrections REGARDLESS as to what lens I use! Why didn't any of you tell me about these sooner???)
Anyway, here are my second set of practice shots.
1) My hairdresser's
2) Severe bend in a lamp post
3) Playing with the sun, since it has become apparent that I may not always be able to get away from it when shooting with this crazy thing
4) The pudgy fountain