The IOP's member magazine "Physics World" turns 25 and has an anniversary issue out. It's full of interesting articles, some more information about the content is on the Physics World Blog, and you can download the issue for free here. It contains a contribution from me on one of the "five biggest unanswered questions in physics" -- "Can we unify quantum mechanics and gravity?"
For the download you apparently have to agree to end up on a newsletter email list. If you don't want that but would like to read my piece, send a brief note to hossi at nordita dot org.