A couple of minutes of research points to this post about ligature in pdf: Make ligatures in Linux Libertine copyable (and searchable). It appears that there are ways of configuring a TeX document so that ligature can be more reliably copied out of PDF as plain text (this depends on correct support of copying out by PDF readers, but some ways of creating PDFs make more readers handle this operation correctly).
Try the link now. Still looks pretty, and copy&paste works.
Here is a short new publication from the Singularity Institute, on the 2-day workshop that followed Singularity Summit 2011.
Note the new publication design. We are currently porting our earlier publications to this template, too.