There is no doubt that them term skeptics.se, which stands shortly for Skeptics Stack Exchange (skeptics.stackexchange.com) is very commonly used on this site, many times I have typed skeptics.se on my browser thinking it would link to skeptics.stackexchange.com and I got linked nowhere.
One time I wanted to share a question on skeptics on Twitter, and due to the characters limit I couldn't finish one single sentence (even with the stackexchange sharing link). So, I had a search on a domain registrar and it seemed no one had registered the swedish domain name skeptics.se, I saw it as an opportunity and bought it. I have also had the idea to integrate it with the StackExchange API so that we could have a URL shortener for questions on this site.
As for the questions, you just have to type skeptics.se along with the id of the question. For example:
I might create other redirects (for users and meta section) if this domain was pratical and effective.