The first version of the package system is now available (download for Windows, or the source code is available in git). You can find information about it on the wiki, and provide your feedback over at the forums!
This is the first iteration of it – don’t expect a lot, really – but do provide feedback on how you’d like to see it most useful.
This version also includes the server-side MXP support – please test that out as well and provide feedback!