We have just produced a new release of Brian, version 1.1.3, with the following changes:

STDP now works with DelayConnection
Added EventClock
Added RecentStateMonitor
Added colormap option to StateMonitor.plot
Added timed array module, see TimedArray class for details.
Added optional progress reporting to run()
New recall() function (converse to forget())
Added progress reporting module (brian.utils.progressreporting)
Added SpikeMonitor.spiketimes
Added developer’s guide to docs
Early version of brian.hears subpackage for auditory modelling
Various bug fixes

You will also notice that the manual now includes a developer’s guide. If you are interested in contributing, we suggest you to subscribe to the Brian development mailing list.