There were a total of 28 new stories: 16 novelettes, and 12 short stories this year at Interzone, for a total of about 227,000 words of fiction. (I caution as ever that Interzone is not easy to do word counts on, and that quite a few stories were in the 7000-8000 word range, thus I may have the various counts slightly off. I suspect my word counts for the magazine run slightly high, so there were probably a couple more short stories and fewer novelettes.)
Of the novelettes, my favorite was "The Silver Wind", by Nina Allan (March-April), about a man in an oppressive future who becomes intrigued with the possibility of time travel, back to a time before his wife's death -- but time is more complex than he realizes.
Other good novelettes: Sarah L. Edwards's "By Plucking Her Petals" (January-February), about magically taking "beauty" from one thing and bestowing on something else, generally a rich woman (or a rich man's woman); Jason Sanford's "Her Scientifiction, Far Future, Medieval Fantasy" (May-June), another "strange" story from this colorful writer, about a woman trapped in a simulation and her hopes for an independent life; and, from November-December, "Digital Rites" by Jim Hawkins, about making movies with simulated actors driven by the minds of real people who start dying -- it begins as a tense thriller, and mostly delivers until a flat ending.
The best short stories were Mercurio D. Rivera’s "For Love's Delirium Haunts the Fractured Mind" (July-August), another of his series about the Wergen, an advanced alien race troublingly obsessed with humans who use that obsession to enslave them -- here we see a Wergen resistance; Michael R. Fletcher's "Intellectual Property" (January-February), twisty fun about an operative investigating a corporation which uses brain conditioning to ensure their employees keep their secrets; "Tethered to the Cold and Dying" by Ray Cluley (March-April), one of a few Jack and the Beanstalk retellings I saw this year, this one SF set on a ruined planet where a man hopes to find a way up the space elevator; "Sleepers", by Jon Ingold, about a priest interviewing the dying ancestor of one of the few survivors of an Alpha Centauri colony, and learning ambiguous hints of something potentially sinister; and Fiona Moore's "The Metaphor" (September-October), about using role-playing games as a way of enhancing worker interest in boring jobs.
Stats: Interzone remains mainly focussed on SF: I'd say perhaps 22 of the 28 stories were SF, or 79%. 5 of the stories were by women, about 18%.