Oh, I always indent code, but I've never come across a language that uses whitespace to decide intent. I'm used to stuff like IF ... ENDIF or braces for that kind of stuff. It just struck me as really bizarre. Still, I also like cheese and jam in the same sandwich, so what is really just a language quirk didn't strike me as a good reason not to give it a go.
Having played with Python for a week or so, here's what I've noticed about this whole whitespace thing:
Because I don't have to use extra statements to denote the end of a code block, I type less code. If it really bothered me that much, I figured I could always put in a comment to fake it. (#ENDIF for example). As it happened, it took about five minutes to get used it, so I didn't bother.
In my opinion, Python code is the easiest to read. It is much easier to see the structure of properly-indented code if extraneous stuff, like endifs and brackets, is taken out. This is just my opinion of course.
So I'm something of a convert, I think.