I've noticed much of the best analysis and discussion of UX on other sites is not about applications one has designed themselves but rather popular, large market applicaitons, like this interesting piece about Google Circles and Path 2 solving the wrong problems.
I thought I'd ask since it seems like we're fairly stagnant on questions lately, but there's still plenty of interesting, good and bad UX decisions out there--I thought if our own personal projects weren't providing enough stimulating questions we should question other projects.
Sort of related is Patrick's question about questions about full products, but that's about a whole product; I find that much too broad. I'm talking about questions asking for reasonings behind specific details, such as Drop Box's lovely installation guide. I think that questions like that can provoke some answerable questions and maybe draw some attention to the site; a lot of attention is already focused on these popular products, if we could ask some interesting questions we could use that popularity to draw in people.