I was a little hesitant to try another natural deodorant after my experience last August with the Tom's of Maine one, but my sister (who isn't especially ecominded) convinced me that Herbal Clear Natural Deodorant was a winner. It's aluminum, paraben, and alcohol free, and a super bargain -- it was less than $2 at the grocery store (although it's $3.19 on Amazon).
I've been using it for a few weeks now, and I have to say that I agree with my sister. Like the Tom's deodorant, it goes on a little goopy, but it dries relatively quickly and I don't have that recurring goopy feeling throughout the day. I won't be convinced that it's a true winner until after we've weathered a sticky, sweltering New York summer together, but I'm at least a winter convert.