Here are a few talks I enjoyed, not counting the LibreOffice ones:
Simplifying reuse with metadata support in ODF and plugin APIs — finally a simple way to copy&paste images from Firefox to LibreOffice with source attribution.
Combining the power of Valgrind and GDB — useful to know about this possibility
Two uses cases for the clang C++ parser: Online Code Browser and Qt moc Replacement. — maybe the first could replace our crappy Java-based opengrok? We’ll see.
I was also happy to meet Jacobo, Matus, Tim and Tomaž finally personally. :-)