A good hour of my time has been wasted today trying to manuallly install
biblatex. When trying to compile a document with Kile it choked up
'biblatex.sty' not found., evidentially because the package wasn’t installed.
I downloaded biblatex from CTAN, followed the README about halfway (which took a while) and then lost interest. I resorted to Google, desperate for a quicker way. Luck fell my way, I stumbled on something I’d missed during the previous hour of Googling:
sudo apt-get install biblatex
There’s a package in the repository for it. Great. I hope this post saves you the hour of searching I lost today!