Two very cool American magazines are open for themed submissions at the moment.
–Tin House accepts submissions on the themes of Theft until March 15th, and Faith until May 31st. They’re also open for non-themed submissions, and for the Flash Fridays series they run on their blog (I was delighted to have a story appear there a few months back. Submissions to The Open Bar blog should be sent via email to firstname.lastname@example.org with the name of the category (e.g. Flash Fridays, Flash Fidelity, etc.) in the subject line.)
– Barrelhouse has two calls for submission at the moment: on Riots for their print issue (deadline May 1st), and the 90s for their online incarnation.