Currently, this channel is not logged anywhere. This change will only be made if the community agrees that a searchable online log would be an improvement. If you have thoughts or comments on this proposal, then please post them to this Biostar thread. In two weeks' time (around September 17, 2014), we'll summarize the discussion and publish a decision.
Starting sometime after community discussion ends (and assuming that discussion is favorable):
At least two weeks before the change:
Warnings will be added to the IRC channel information and on the wiki, that the log will be publicly archived as of the given start date.
The project's IRC channel came up at the GalaxyAdmins BoF meetup at GCC2014, where it was lauded as both a great resource, and cursed because it is not archived anywhere. An action item from that meetup is to propose this change.