As I already know C#, and have played around with Java a bit, I figured that using Java on App Engine was the way forward. So I followed the instructions to start getting things set up, and then started looking at the tutorial. Which seemed ridiculously complex for doing the basics. Loading data looked like the kind of thing that would drive a person crazy. So I had a quick look at the Python equivalent and was able to wrap my brain around it with very little difficulty. Which makes me wonder why the Java version is so complicated.
But anyway, despite the itchy feeling that working without an IDE gives me, I've worked my way through the tutorial, puzzled over some basic syntax, and I think I've got the hang of the basics. It seems simple enough, I quite like the use of whitespace, and I'm now going to play around with some code of my own.
Once, that is, I've gone looking for a decent IDE that will, at the very least, point out when I've mispelled something, and preferably allow me to step through my code!