I've come across several questions about usability which I feel would be better asked on uxexchange.com. This raises the slightly tricky issue that uxexchange is an 'old style' SO member - i.e. it doesn't go through the area51 route, but uses Stack Exchange.
What do people feel about usability questions on pro webmasters?
I think usability questions are very much on topic. It is part of our job to identify bottlenecks that keep users from doing whatever we want them to be doing and fix them.
Pro Webmasters is going to have a bit more overlap than most, but only because webmasters tend to wear many hats.
As long as the question fits within the guidelines described in the FAQ, of course. I can imagine that it might be hard to write a question on usability that could conceivably have a single correct answer, but not impossible.
I had a look at the uxexchange but it doesn't look like a site I would visit or be interested in, so I don't see it as a viable alternative to this site.
