WISE

The First Hundred Brown Dwarfs Discovered by the Wide-field Infrared Survey Explorer (WISE)
http://arxiv.org/abs/1108.4677

The Discovery of Y Dwarfs Using Data from the Wide-field Infrared Survey Explorer (WISE)
http://arxiv.org/abs/1108.4678

WISE J111838.70+312537.9 is a newly-discovered member of the nearby multiple star system Alula Australis:
A T8.5 Brown Dwarf Member of the Xi Ursae Majoris System

More Y-dwarfs...
Further Defining Spectral Type "Y" and Exploring the Low-mass End of the Field Brown Dwarf Mass Function

Brown dwarfs seem to be rarer than expected...
WISE Finds Few Brown Dwarfs Close to Home

I find that somewhat disappointing...

Sunchaser wrote:I find that somewhat disappointing...

Look on the bright side: There's a smaller chance of a brown dwarf infiltrating the Solar system and messing things up as we all go around the Great Milky Way Merry-Go-Round.

Not so surprising result, actually. If my memory serves, the detected number of young brown dwarfs in star clusters is much less than the number of stars?

BTW, this result of course does not exclude the possibility that there are rogue planets between the Sun and Alpha Centauri, masses up to several Jupiters.

Or less maybe

Confusion limited surveys: using WISE to quantify the rarity of warm dust around Kepler stars

One candidate dust disc around an A-type star (KIC 7345479).

Not related to exoplanets or brown dwarfs, but definitely worth mentioning:

http://www.nasa.gov/mission_pages/WISE/news/wise20120829.html

Bonanza of newfound supermassive black holes and extreme galaxies called hot DOGs, or dust-obscured galaxies.

A 0.5–20 Jupiter mass object with a temperature 250–400 K. May be either a brown dwarf or a free-floating planet.

The Coldest Brown Dwarf (Or Free Floating Planet)?: The Y Dwarf WISE 1828+2650
http://arxiv.org/abs/1301.1669

The Closest Star System Found in a Century
http://science.psu.edu/news-and-events/2013-news/Luhman3-2013

WISE J104915.57-531906.1, a brown dwarf binary at 2.0±0.15 parsecs. Primary is L8±1, secondary near the L/T transition.

The best estimate of the distance (ignoring the error bars) puts the binary slightly further away than Barnard's Star.

WOw!
Edit: Now on arXiv.
http://arxiv.org/abs/1303.2401

More on WISE J104915.57-531906.1
http://arxiv.org/abs/1303.5345

Offers also some more memorable designations for the system: "Luhman 16" (its preliminary WDS designation) or maybe "Luhman-WISE 1".

Why not Luhman's Star, like other nearby stars named after the people who discovered or recognized them?