One nice result from NASA's WISE infrared survey of the sky is the discovery of particularly cool (as in 'not very warm') stars, now called 'Y dwarfs'. This was reported, for example, in
NASA's WISE mission discovers coolest class of stars (Science Daily, August 24, 2011).
whic includes a pretty nice artist's representation of what they might look like:
Could we achieve a high enough resolution to actually be able to study the dynamics of brown dwarf atmospheres in the near-future?
The one thing with brown dwarfs (especially isolated ones like this) is that you can't really subtract the transit spectrum from the parent spectrum (as you can with transiting exoplanets)