Thanks for all the advice guys!
I just got back from three days of practice casting at my favorite reservoir. I was trying to catch fish, but they didn't participate in the exercise for some silly reason.
So, I got tons of practice casting in.
One of my buddies was fly fishing from a kayak too and at first I was having problems. I was hitting the water behind me... thinking that the line wasn't loaded yet I guess.
I found that holding my casting much higher than I would when standing helped a lot! I especially raised my arm on the back cast.
I also found that my lighter weight outfit was easier to cast than my heavier one... which seems to contradict what some of you suggested. I guess it's just me, not your advice.
Now the next step is to figure out how to get a fish on the sharp end.