Among the top bits were the tutorials by Leesa Brieger, not to mention the talks by DICE director Reagan Moore. He covered a lot of interesting stuff that is going on both with the iRODS software itself, and in how it is being used.
From the tutorials, I was very happy to get a federation up working, between two local datagrids that I managed to install on my laptop, and to actually iput a file from one of them to the other, yay! :) ... and to get the iRODS rule engine debugger idbug to work (See this page for some instructions). The idbug debugger will let you watch - in real-time - exactly which iRODS rules and actions are being executed when you trigger some icommand etc. Seems like a totally essential tool for any iRODS rules development!
Back to Reagan Moore's talks and what is going on with the iRODS software, many nice new things are supposed to come in the upcoming 3.2 release, which is actually supposed to being released next week or so.
Some things that sounded especially interesting:
Reagan also covered a bit of the things that are expected to show up in the near future. Among the interesting bits there, was DDN:s work on integrating iRODS directly into the storage controllers in their storage systems hardware, and the ongoing NSF funded project to create a nationwide (as in US) and discipline-crossing data federation network. Read more about that at datafed.org.
One thing I found extra interesting, was that Reagan mentioned some group (CIBER-U) doing MediaWiki integration of iRODS! Gotta figure out if they do share their code ... sounds really interesting!
Among my personal notes for further checking up, is also the "Fedora Commons" project, that seems to have a lot of overlap with iRODS, so I'd be interested to figure out more how they do actually compare in terms of key features.